C / C++ / MFC

1-Jan-09 20:58

unsigned char sBuffer[];
sBuffer[8]= 0x80 | 0

What is the value of sBuffer[8]?
Thanks

Nibu babu thomas1-Jan-09 21:08

1-Jan-09 21:08

hung1984 wrote:
unsigned char sBuffer[];
sBuffer[8]= 0x80 | 0

Array size must be specified!

hung1984 wrote:
What is the value of sBuffer[8]?

You can quickly check in the debugger to find out!

Nibu babu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

enhzflep1-Jan-09 21:12

enhzflep

1-Jan-09 21:12

128

dec821-Jan-09 21:15

1-Jan-09 21:15

what do "|" do?
Thanks

CPallini1-Jan-09 22:10

CPallini

1-Jan-09 22:10

What about documentation [^]?
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

doubt in GetMessagePos() function

Jijo.Raj1-Jan-09 23:21

Jijo.Raj

1-Jan-09 23:21

Check out this tutorial - An introduction to bitwise operators[^].

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

KASR11-Jan-09 20:13

KASR1

1-Jan-09 20:13

DWORD GetMessagePos(void);
This function returns a long value that gives the cursor position in screen coordinates.

How to get X and y coordinates.

Nibu babu thomas1-Jan-09 20:19

1-Jan-09 20:19

Use GET_X_LPARAM and GET_Y_LPARAM.

// An eg:
const DWORD Pos = GetMessagePos();
const short XPos = GET_X_LPARAM(Pos);
const short YPos = GET_Y_LPARAM(Pos);

Another alternative is to use MAKEPOINTS structure, depends on if you want your pos wrapped in a POINT struct.

Nibu babu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

Hamid_RT1-Jan-09 20:20

Hamid_RT

1-Jan-09 20:20

CPoint point = CPoint(GetMessagePos());

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

PCuong19831-Jan-09 21:22

PCuong1983

1-Jan-09 21:22

Or use LOWORD and HIWORD macro instead, like this

DWORD dwPos = ::GetMessagePos ();
CPoint point (LOWORD (dwPos), HIWORD (dwPos));
        //ScreenToClient (&point);

initializing code for a New Dialog Box

Michael Dunn2-Jan-09 13:12

Michael Dunn

2-Jan-09 13:12

Do not use LOWORD and HIWORD. Coordinates are signed values, LO/HIWORD treat the parameter as unsigned.

--Mike--
Visual C++ MVP Cool | :cool:

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"That's what's great about doing user interface work. No matter what you do, people will say that what you did was idiotic." -- Raymond Chen

hrishiS1-Jan-09 19:51

hrishiS

1-Jan-09 19:51

Hi All,
Could anyone tell me where to put the code for initialization for a new added dialog box in MFC application?
The InitInstance() is available only for the main window, inside which we can write code for initialization.But my problem is , where to write the code for a newly created dialog (if i want to do something when the dialog gets loaded)
Than u in advance
Himangshu

Re: initializing code for a New Dialog Box

CPallini1-Jan-09 20:06

CPallini

1-Jan-09 20:06

The right place is OnInitDialog [^].
Smile | :)

Re: initializing code for a New Dialog Box

Hamid_RT1-Jan-09 20:07

Hamid_RT

1-Jan-09 20:07

What do you think about Constructor or WM_INITDIALOG?

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: initializing code for a New Dialog Box

Nibu babu thomas1-Jan-09 20:08

Re: Working wiht MFC Dialog

1-Jan-09 20:08

Member 4250705 wrote:
But my problem is , where to write the code for a newly created dialog (if i want to do something when the dialog gets loaded)

In MFC for every dialog there must be a class that's generated by the class wizard. Also it generates a function for this class called OnInitDialog, this function is called after the dialog and it's controls are created but not bound to data exchange member variables, which will be done when we call CDialog::OnInitDialog from our OnInitDialog.

There must be a comment in your OnInitDialog function which says

// Add your initialization code here
So after this call you can add your code for intialization.

Nibu babu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

Working wiht MFC Dialog

Member 36811811-Jan-09 19:21

Member 3681181

1-Jan-09 19:21

i have call a dialog class on button click of another dialog class, i want to close the dialog from where i have clicked the button. is there any method or function to handle this event?

CPallini1-Jan-09 20:04

CPallini

1-Jan-09 20:04

Have a look at this nice article [^].
Smile | :)

Compile time errors

Aabid1-Jan-09 19:17

Aabid

1-Jan-09 19:17

Hi

Can AnyBody tell me How to sort out these errors....i am using Vs2005 (VC++)

Compiling...
CommonHeader.cpp
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(382) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(383) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(383) : error C2143: syntax error : missing ')' before ';'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(452) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(476) : error C2061: syntax error : identifier '__in_z_opt'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(477) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(485) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(486) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(502) : error C2061: syntax error : identifier '__in_z_opt'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(504) : error C2061: syntax error : identifier '__in_z_opt'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(505) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(580) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(594) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(619) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(621) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(61) : error C2065: '__in_z' : undeclared identifier
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(61) : error C2146: syntax error : missing ')' before identifier 'LPTSTR'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(61) : error C2761: 'BOOL CHttpServerContext::GetServerVariable(void)' : member function redeclaration not allowed
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(62) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(63) : error C2143: syntax error : missing ';' before '{'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(63) : error C2447: '{' : missing function header (old-style formal list?)
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(120) : error C2146: syntax error : missing ')' before identifier 'LPTSTR'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(120) : error C2761: 'BOOL CHttpFilterContext::GetServerVariable(void)' : member function redeclaration not allowed
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(121) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(122) : error C2143: syntax error : missing ';' before '{'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(122) : error C2447: '{' : missing function header (old-style formal list?)
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(126) : error C2146: syntax error : missing ')' before identifier 'LPTSTR'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(126) : error C2761: 'BOOL CHttpFilterContext::AddResponseHeaders(void)' : member function redeclaration not allowed
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(127) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(128) : error C2143: syntax error : missing ';' before '{'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(128) : error C2447: '{' : missing function header (old-style formal list?)
DatabaseHandler.cpp
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(382) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(383) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(383) : error C2143: syntax error : missing ')' before ';'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(452) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(476) : error C2061: syntax error : identifier '__in_z_opt'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(477) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(485) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(486) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(502) : error C2061: syntax error : identifier '__in_z_opt'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(504) : error C2061: syntax error : identifier '__in_z_opt'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(505) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(580) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(594) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(619) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(621) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(61) : error C2065: '__in_z' : undeclared identifier
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(61) : error C2146: syntax error : missing ')' before identifier 'LPTSTR'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(61) : error C2761: 'BOOL CHttpServerContext::GetServerVariable(void)' : member function redeclaration not allowed
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(62) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(63) : error C2143: syntax error : missing ';' before '{'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(63) : error C2447: '{' : missing function header (old-style formal list?)
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(120) : error C2146: syntax error : missing ')' before identifier 'LPTSTR'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(120) : error C2761: 'BOOL CHttpFilterContext::GetServerVariable(void)' : member function redeclaration not allowed
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(121) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(122) : error C2143: syntax error : missing ';' before '{'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(122) : error C2447: '{' : missing function header (old-style formal list?)
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(126) : error C2146: syntax error : missing ')' before identifier 'LPTSTR'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(126) : error C2761: 'BOOL CHttpFilterContext::AddResponseHeaders(void)' : member function redeclaration not allowed
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(127) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(128) : error C2143: syntax error : missing ';' before '{'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(128) : error C2447: '{' : missing function header (old-style formal list?)
eScanISARegister.cpp
GENERAL.CPP
main.cpp
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(382) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(383) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(383) : error C2143: syntax error : missing ')' before ';'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(452) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(476) : error C2061: syntax error : identifier '__in_z_opt'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(477) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(485) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(486) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(502) : error C2061: syntax error : identifier '__in_z_opt'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(504) : error C2061: syntax error : identifier '__in_z_opt'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(505) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(580) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(594) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(619) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.h(621) : error C2061: syntax error : identifier '__in_z'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(61) : error C2065: '__in_z' : undeclared identifier
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(61) : error C2146: syntax error : missing ')' before identifier 'LPTSTR'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(61) : error C2761: 'BOOL CHttpServerContext::GetServerVariable(void)' : member function redeclaration not allowed
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(62) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(63) : error C2143: syntax error : missing ';' before '{'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(63) : error C2447: '{' : missing function header (old-style formal list?)
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(120) : error C2146: syntax error : missing ')' before identifier 'LPTSTR'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(120) : error C2761: 'BOOL CHttpFilterContext::GetServerVariable(void)' : member function redeclaration not allowed
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(121) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(122) : error C2143: syntax error : missing ';' before '{'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(122) : error C2447: '{' : missing function header (old-style formal list?)
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(126) : error C2146: syntax error : missing ')' before identifier 'LPTSTR'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(126) : error C2761: 'BOOL CHttpFilterContext::AddResponseHeaders(void)' : member function redeclaration not allowed
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(127) : error C2059: syntax error : ')'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(128) : error C2143: syntax error : missing ';' before '{'
c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxisapi.inl(128) : error C2447: '{' : missing function header (old-style formal list?)
Generating Code...
Creating browse information file...
Microsoft Browse Information Maintenance Utility Version 8.00.50727
Copyright (C) Microsoft Corporation. All rights reserved.
Build log was saved at "file://e:\source\ESSource\ISA Proxy\eScanISA\eScanISAonVS2005\Debug\BuildLog.htm"
eScanISA - 93 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Re: Compile time errors

Hamid_RT1-Jan-09 20:11

Hamid_RT

1-Jan-09 20:11

Do you like to more explain about your problem I cant see your monitor its so far?

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: Compile time errors

PCuong19831-Jan-09 21:25

PCuong1983

1-Jan-09 21:25

Oopt!
where is your codes that generated these error ?

sprintf?

dec821-Jan-09 18:45

1-Jan-09 18:45

void *ptrList [30];
char ss [40];
for (i = 0; i<26; i++)
{
if (ptrList [i])
sprintf(ss, "%s", *(CString *) ptrList [i]);
}

What do those code do?
Thanks.

Re: sprintf?

Nibu babu thomas1-Jan-09 18:58

1-Jan-09 18:58

hung1984 wrote:
if (ptrList [i])
sprintf(ss, "%s", *(CString *) ptrList [i]);

From the code...

ptrList is an array of CString pointers which for some reason is kept as void pointers, but the developer knows it's internally CString* so he is "confidently" casting it to CString* then copying the CString value to a character buffer (ss).

Confusing at times and also he forgot another step to cast *(CString*) to LPCTSTR and to use _stprintf instead of sprintf.

So after correction the code will look like...

void *ptrList [30];
char ss [40];
for (i = 0; i<26; i++)
{
  if (ptrList [i])
  {
    LPCTSTR lpctszStr = (LPCTSTR)(*(CString *) ptrList [i]);
    _stprintf(ss, "%s", lpctszStr);
  }
}

Nibu babu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

Re: sprintf?

ThatsAlok1-Jan-09 19:02

ThatsAlok

1-Jan-09 19:02

hung1984 wrote:
if (ptrList [i])
sprintf(ss, "%s", *(CString *) ptrList [i]);

it's copying content of ptlist to ss!

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Re: sprintf?

dec821-Jan-09 21:10