C / C++ / MFC Discussion Boards

Jim Crafton29-Jun-04 18:35

29-Jun-04 18:35

I checked, and all of my controls have the WS_CLIPCHILDREN bit set, the main window, and the any custom child control's that get created (the toolbar's parent is a custom child control)

¡El diablo está en mis pantalones! ¡Mire, mire!

Real Mentats use only 100% pure, unfooled around with Sapho Juice(tm)!

SELECT * FROM User WHERE Clue > 0
0 rows returned

Visual Basic Question

Stylemaster26-Jun-04 3:47

Stylemaster

26-Jun-04 3:47

Hey there

I've just started to learn programming and using visual basic 6 (teaching myself) would really appreciate it if someone could explain to me how it is that variables work and exactly how to use them as this part has got me stumped.

Thanx a million

Style

Work hard, Play hard

Re: Visual Basic Question

Hesham Amin26-Jun-04 4:15

Hesham Amin

26-Jun-04 4:15

since this is a VB6 Q.
you should send it to the vb forum not vc++

anyway :
you use variables to store some data in memory for processing...

for example..

dim a as single
dim b as single
dim c as single 'here i made 3 place holders in memory for single variables.

a=CSng(Text1.Text) 'read data from Text1 into memory location called a
b=CSng(Text2.Text) 'read data from Text1 into memory location called b
c=(a+b)/2 'get the avarage of the two numbers and store it in c for latter use

MsgBox c 'use the variable c

Send msg to child by using FindWindow

Sumit Kapoor26-Jun-04 0:16

Sumit Kapoor

26-Jun-04 0:16

hi...

I've to much deep child to which i want to sen msg. from mainfrm class..

as there r some RUNTIME_CLASS...
so can't understand how to pass msg. from mainframe to that class..
can anybody help me..
I've hint as v may need to use FindWindow..But can't get solution yet from tweo days..
can anybody help?

THanks

---Sumit Kapoor--- sumit_kapoor1980@hotmail.com

Re: Send msg to child by using FindWindow

PJ Arends26-Jun-04 6:06

PJ Arends

26-Jun-04 6:06

You have asked this question before. A quick look in MSDN will reveal a host of functions that you could use to find the CWnd pointer to the window you want to send the message to. Look up CWnd, CFrameWnd, CSplitterWnd, CView, and CDocument. Read what each of the member functions does, and find the ones that will do what you want.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

CComboBox

TrungHuynh25-Jun-04 23:57

TrungHuynh

25-Jun-04 23:57

Hello every body

I'm writting a GUI TOol Kit for MFC control, for every controls of MFC

CButton,... I replace with CBMSButton... and i use the

DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) function to draw.

IT work fine with button,Titlebar, CheckBox, Radio

But with CComboBoxEx i replace with CBMSComboBox and i call DrawItem

but this function isn't called. I don't know why ?

Please help me. Thank so much

Re: CComboBox

PJ Arends27-Jun-04 8:01

PJ Arends

27-Jun-04 8:01

I have had to use the CBS_OWNERDRAWVARIABLE style instead of the CBS_OWNERDRAWFIXED style to get the DrawItem function to work. I do not know why CBS_OWNERDRAWFIXED did not work.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

C and SMTP

robert cooper25-Jun-04 22:55

robert cooper

25-Jun-04 22:55

Hi,

I want to use SMTP (sendmail) to send email where the body is an HTML document rather than plain text, is this possible and if so how do I go about doing it? I haven't been able to find any sample code other than plain text emails.

Regards

Robert Cooper

Re: C and SMTP

markkuk25-Jun-04 23:11

markkuk

25-Jun-04 23:11

HTML is "plain" text, you send it the same way as an unformatted text message. Just change the "Content-type:" header from "text/plain" to "text/html".

problem with dll

dolph_loe25-Jun-04 20:38

dolph_loe

25-Jun-04 20:38

In a dll, I define a class in the following way:

<br />
class _declspec(dllexport) jalla {<br />
	std::list<int> m_mesh;<br />
};<br />

but when I try to compile it, I get the warning:

<br />
e:\Work\C++\Project\3DGame\3DSLoader.h(19) : warning C4251: 'jalla::m_mesh' : class 'std::list<_Ty>' needs to have dll-interface to be used by clients of class 'jalla'<br />
        with<br />
        [<br />
            _Ty=int<br />
        ]<br />

what is happening?

øivind

Re: problem with dll

dolph_loe25-Jun-04 20:40

dolph_loe

25-Jun-04 20:40

the class is like this:

class _declspec(dllexport) jalla {
std::list<int> m_mesh;
};

øivind

Re: problem with dll

Jörgen Sigvardsson27-Jun-04 11:17

Jörgen Sigvardsson

27-Jun-04 11:17

It means that the instance std::list<int> needs to have a dllexport attribute on it in order to be safely usable by clients. Just like you are tagging jalla with dllexport.

As you may understand, exposing STL datatypes through a DLL interface is not easy. I don't know any good workarounds for it, other than using a non templated and exportable type/class. Sorry. Frown | :(

--
Ich bin Joachim von Hassel, und ich bin Pilot der Bundeswehr.
Welle: Erdball - F104-G Starfighter

Pipes

Archer28225-Jun-04 20:08

Archer282

25-Jun-04 20:08

does anyone know of a tutorial that explains pipes and how to use them

please dont refer to me the MSDN CD.
if i had it, dont you think i would use it?

Re: Pipes

Trollslayer26-Jun-04 5:47

Trollslayer

26-Jun-04 5:47

It is available online at http://msdn.microsoft.com/[^].

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

Re: Pipes

Graham Bradshaw26-Jun-04 13:54

Graham Bradshaw

26-Jun-04 13:54

MSDN, as per Elaine's reply above, is probably the best starting point, especially here[^], but a bit closer to home, you could also try this article [^]or this one[^].

Minimize another app.

Some_Dude25-Jun-04 18:53

Some_Dude

25-Jun-04 18:53

Im trying to find a good way to minimize a game(full screen) when I press a key combination like alt + tab, but it needs to workin in windoes xp. I can't seem to find an appropriate function to use for this. any suggestions?

Re: Minimize another app.

Archer28225-Jun-04 20:05

Archer282

25-Jun-04 20:05

You can use GetAsyncKeyState() or GetKeyState() to test for th keys

then you can GetTopWindow() or GetActiveWindow() something like that i dont remember which it is
to get a handle to the active window,
and then call CloseWindow() (it doesnt actually close it it just minimizes it)

if you need help with it just let me know, it shouldnt take me a few minutes to write the whole thing

Re: Minimize another app.

Some_Dude26-Jun-04 20:50

Some_Dude

26-Jun-04 20:50

Ok well im getting somewhere but not quite doing what i need. Here is what im trying to do:

Build a simple app the runs in the background while I play a full screen game. The game does not have an minimize ability. So I want to have my app minimize the game when I press Ctrl+Z.

So far I have been able to get it to work (sort of) but only for windows and not the full screen game that I want to minimize. I'm using GetAsyncKeyState() to test the keys and GetForegroundWindow() to get the handle to the active window then just use CloseWindow() to minimize. But this does not seem to work for full screen apps. Any suggestions?
Thanks for the help.

Re: Minimize another app.

Archer28227-Jun-04 17:28

Archer282

27-Jun-04 17:28

Well, you could also use ShowWindow() to hide and show it,

here is what i would do

in the main thread set a HWND variable to 0 by default, continously loop and test for CTRL+Z

if CTRL+Z is pressed and the variable is 0, then call GetForegroundWindow() and store its hwnd in the variable, and hide the window
if the variable is not empty then show the window and set the variable back to 0

change data in C++ dll by a C# program

ting66825-Jun-04 17:15

ting668

25-Jun-04 17:15

HI~

I would like to ask
How do I change the data in C++ dll by a C# program?

I have ever tried this.
I wrote a dll with VC++. There is a variable in the dll (e.g "m_string"). "m_string" is a LPCTSTR type and it's inital value set by constructor is _T("Hello World"). I also wrote a function for setting the variable. The function is declared like this:

extern "C" _declspec(dllexport) void set(LPCTSTR s)
{
m_string = s;
}

Afterward, I wrote a C# dll assembly. The C# dll import the dll written by C++. The import the dll like this:

#region DLLImports

[DllImport("Test.dll")] //test is the C++ dll filename
private static extern void Set(string s);

#endregion

Finally, I wrote a form to call the method "Set". After the method have finished executing, the value "m_string" does not change. The "m_string" is still "Hello World".

My question is, how to change a variable in dll permanently by a C# library or exe?

Thanks

how to creat a SubDialog dynamically

yingkou25-Jun-04 15:50

yingkou

25-Jun-04 15:50

I want to creat a SubDialog dynamically,but not use the method of importing a dialog in the resource,what should I do?

Thanks a lot

Re: how to creat a SubDialog dynamically

Michael Dunn25-Jun-04 17:03

Michael Dunn

25-Jun-04 17:03

It is a lot of work, but you can create a dialog template in memory and call CreateDialogIndirect(). Check out this blog[^] as the author has given all the details of dialog templates in the past week.

--Mike--
Personal stuff:: Ericahist | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ
----
Laugh it up, fuzzball.

Child Window Not Recieving Keyboard Input Properly

Xzyx987X25-Jun-04 15:49

Xzyx987X

25-Jun-04 15:49

I have a custom control which I want to be able to recieve input from the keyboard. I planned to accomplish this by processing the WM_KEYDOWN message, but I've been having some problems. First of all, most of the keys trigger a beep sound when they're pressed like the window is refusing them, although they still trigger a WM_KEYDOWN and get proccessed properly. Second, a few keys (such as the arrow keys) don't trigger a WM_KEYDOWN, or do anything at all for that manner. This problem only shows up when the control window is created as a child, when I create it as an independant window there is no problem. If np one can solve this problem I suppose I can program the window manually to behave as a child, but there's gotta be a better solution, right?

Re: Child Window Not Recieving Keyboard Input Properly

Johan Rosengren25-Jun-04 20:14

Johan Rosengren

25-Jun-04 20:14

You might want to handle the WM_GETDLGCODE-message in your custom control. Return DLGC_WANTALLKEYS and see if it helps. Note that the tab-key will also be routed to the child, and that you might want to experiment with a combination of returns. MSDN has the list of possible values.

Re: Child Window Not Recieving Keyboard Input Properly

Xzyx987X25-Jun-04 23:43

Xzyx987X

25-Jun-04 23:43

Thanks, that worked perfectly. I would've thought something like this would come up fairly often, but I asked tons of places and this is the first I got an anwser from.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.