Re: How to convert a BSTR into a character array - C / C++ / MFC Discussion Boards

How can add menu on right click of Tree?

Le@rner24-Aug-09 0:35

24-Aug-09 0:35

Hi all,

i have create a Tree by derived my class from TreeView.

please tell me how can i add menu on right click of tree,and how can handle menu item over tree.

please help me for this if possible please exaplin me with any example.

thanks in advance.

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

Re: How can add menu on right click of Tree?

Iain Clarke, Warrior Programmer24-Aug-09 6:33

Iain Clarke, Warrior Programmer

24-Aug-09 6:33

You need to go through a few steps...

1/ Add a handler for NM_RCLICK.

2/ Get the mouse position (annoyingly, this is not a field in NM_RCLICK)
GetMessagePos is your friend.

3/ Maybe use TVM_HITTEST to work out which item you're on top of...

4/ Make / load a popup menu.

5/ TrackPopupMenu(Ex)

6/ Do something with the result.

I've seen you here a while, so I hope that should be enough to steer you in the right direction!

Iain.

I have now moved to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), or need cotract work done, give me a job! http://cv.imcsoft.co.uk/[^]

Re: How can add menu on right click of Tree?

Le@rner24-Aug-09 18:04

Le@rner

24-Aug-09 18:04

Thanks ,its done

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

How to convert a BSTR into a character array

pandit8423-Aug-09 22:36

pandit84

23-Aug-09 22:36

Hi ,
I want to convert a BSTR into a character array , I am having string containing alphanumeric character of 30 character . i want it to convert them into a character array..can you please help me in resolving this..

Re: How to convert a BSTR into a character array

«_Superman_»23-Aug-09 22:44

«_Superman_»

23-Aug-09 22:44

I use the _bstr_t class for this.
_bstr_t has an overloaded char* operator.
So all you need to do is create an _bstr_t object and typecast it as char*.

«_Superman_»
I love work. It gives me something to do between weekends.

Re: How to convert a BSTR into a character array

Rajesh R Subramanian23-Aug-09 22:49

Rajesh R Subramanian

23-Aug-09 22:49

If you read and understand the following articles, you will then have a much better understanding of the topic.

The Complete Guide to C++ Strings, Part I - Win32 Character Encodings[^]
The Complete Guide to C++ Strings, Part II - String Wrapper Classes[^]

It is a crappy thing, but it's life -^ Carlo Pallini

Re: How to convert a BSTR into a character array

Stuart Dootson23-Aug-09 23:23

Stuart Dootson

23-Aug-09 23:23

Let's presume your BSTR is called bstr.

UINT len = SysStringLen(bstr);
int bytesNeeded = WideCharToMultiByte(CP_ACP, WC_DEFAULTCHAR, (LPCWSTR)bstr, len, 0, 0, 0, 0);
char* buffer = new char [bytesNeeded + 1];
int bytesNeeded = WideCharToMultiByte(CP_ACP, WC_DEFAULTCHAR, (LPCWSTR)bstr, len, buffer, bytesNeeded, 0, 0);
buffer[bytesNeeded] = 0;

That should create a suitably sized character array and translate your BSTR into it.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: How to convert a BSTR into a character array

pandit8424-Aug-09 0:04

pandit84

24-Aug-09 0:04

Thanks a lot ...Article is really good

Simple Menus That Display Icons in Win32 API (No MFC)

Aabid23-Aug-09 21:22

Aabid

23-Aug-09 21:22

Hello Friends

my task is to append icons to menu (ie .ico), it is very easy to add bmp file to menu, but in order to need transparency i have to use icons only not bmps.

There are lots of programs for this in MFC , but i need to do it in Win32 API
using VC++

Any help is greatly appreciated

Re: Simple Menus That Display Icons in Win32 API (No MFC)

David Crow24-Aug-09 3:19

David Crow

24-Aug-09 3:19

Aabid wrote:
There are lots of programs for this in MFC , but i need to do it in Win32 API

Knowing that MFC is just a thin wrapper around the Win32 API, you should be able to look at the MFC code to tell what MFC is doing, and pick out the relevant parts.

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Re: Simple Menus That Display Icons in Win32 API (No MFC)

Aabid25-Aug-09 0:36

Aabid

25-Aug-09 0:36

Hi david can u guide me how to convert this function to Win32 API,
ie how can i handle this function as message

void CMainFrame::OnInitMenu(CMenu* pMenu)
{
#if _MFC_VER < 0x0800
#undef __FUNCTION__
#define __FUNCTION__ "OnInitMenu()"
#endif // _MFC_VER < 0x0800
AfxTrace(_T(__FUNCTION__) _T(": %#0x\n"), pMenu->GetSafeHmenu());

MENUITEMINFO minfo;
minfo.cbSize = sizeof(minfo);

for (UINT pos=0; pos<pMenu->GetMenuItemCount(); pos++)
{
minfo.fMask = MIIM_FTYPE | MIIM_ID;
pMenu->GetMenuItemInfo(pos, &minfo, TRUE);

HICON hIcon = GetIconForItem(minfo.wID);

if (hIcon && !(minfo.fType & MFT_OWNERDRAW))
{
AfxTrace(_T("replace for id=%#0x\n"), minfo.wID);

minfo.fMask = MIIM_FTYPE | MIIM_BITMAP;
minfo.hbmpItem = HBMMENU_CALLBACK;
minfo.fType = MFT_STRING;

::SetMenuItemInfo(pMenu->GetSafeHmenu(), pos, TRUE, &minfo);
}
else
AfxTrace(_T("keep for id=%#0x\n"), minfo.wID);
// ::DestroyIcon(hIcon); // we use LR_SHARED instead
}
}

We Have To Conert it into case WM_INITMENU:

Re: Simple Menus That Display Icons in Win32 API (No MFC)

David Crow25-Aug-09 2:33

David Crow

25-Aug-09 2:33

See here. Googling for such will also turn up dozens of examples.

Keeping a thread idle for a while

sunny_vc23-Aug-09 20:15

sunny_vc

23-Aug-09 20:15

Hi all,
I have a thread in my application.
When the thread is running its eating up the CPU.
My thread code is like:

ThreadProcess(LPVOID)
{
 while(TRUE)
 {
    if(flag==true)   //This thread waits for the flag to be set 
     {
       ExecFunc();

     }

 }

}

If the flag is set then it will execute the function.This flag is set in other function.
So I want to keep this thread idle until the flag is set.
How can I do it.Please help me.

Regards,
Sunil Kumar

Re: Keeping a thread idle for a while

Adam Roderick J23-Aug-09 20:22

Adam Roderick J

23-Aug-09 20:22

For waiting purpose you can use WaitForSingleObject(Just refer the usage http://msdn.microsoft.com/en-us/library/ms687032(VS.85).aspx[^])
Just create a named event using CreateEvent(refer http://msdn.microsoft.com/en-us/library/ms682396(VS.85).aspx[^])
Now you can wait till that event be signaled from your side.
And for signaling you can use SetEvent(http://msdn.microsoft.com/en-us/library/ms686211(VS.85).aspx[^])

Величие не Бога может быть недооценена.

Re: Keeping a thread idle for a while

Cedric Moonen23-Aug-09 20:25

Cedric Moonen

23-Aug-09 20:25

Don't use a boolean but use an event instead (and use the WaitForSingleObject[^] function). There's also a good tutorial about threads here[^]

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: Keeping a thread idle for a while

Rajesh R Subramanian23-Aug-09 20:46

Rajesh R Subramanian

23-Aug-09 20:46

If you expect the wait time to be relatively long, then use one of those WaitFor... functions. If the wait time would be very low, then a spin loop is an ideal candidate.

It is a crappy thing, but it's life -^ Carlo Pallini

Dll

rdop23-Aug-09 20:14

rdop

23-Aug-09 20:14

Hi All
i have got article of write data in excel from code project.But it's give one exception error.Error is

An unhandled exception of type 'System.NullReferenceException' occurred in WEDLL.dll

Article link http://69.10.233.10/KB/mcpp/automate_Excel_in_C__.aspx[^]
How to solve that problem.
Plz help me.

Re: Dll

rdop23-Aug-09 20:51

rdop

23-Aug-09 20:51

problem solved

Getting process ID

Le@rner23-Aug-09 19:31

Le@rner

23-Aug-09 19:31

Hi all,

I want to get process ID for my dialog based application, when i close my process..

How can i get it...

Thanks in advance

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

Re: Getting process ID

«_Superman_»23-Aug-09 19:44

«_Superman_»

23-Aug-09 19:44

GetCurrentProcessId[^]

«_Superman_»
I love work. It gives me something to do between weekends.

Tree Control without check box in the root

Ranojay23-Aug-09 19:24

Ranojay

23-Aug-09 19:24

Hi friends,

I have a tree control in MFC, if I use the check box option, then even the root item
gets the check box.

I want to have a tree control with check boxes in the child but not at the root.

thanks
Raanojay

Re: Tree Control without check box in the root

zhu_lin23-Aug-09 20:49

zhu_lin

23-Aug-09 20:49

i will send you the source codes. MSN: zhu_lin4103@126.com

it's my pleasure to make friend with you.

Re: Tree Control without check box in the root

Ranojay23-Aug-09 20:54

Ranojay

23-Aug-09 20:54

Thanks a lot, friend

where do I find the source codes ?

Re: Tree Control without check box in the root

zhu_lin23-Aug-09 21:12

zhu_lin

23-Aug-09 21:12

tell me your msn or your email, i will send to you

it's my pleasure to make friend with you.

Re : Displaying the icons only for subitems in the CListCtrl.

Gokul_md23-Aug-09 19:08

Gokul_md

23-Aug-09 19:08

Hi
i have two columns in the CListCtrl. i want to display the immage only for the subitems and not for the first column. The CListCtrl has set the extended style property of LVS_EX_SUBITEMIMAGES.
when i am trying to load the icons for the subitems it also displayes the first column. how to avoid displaying the icon in the first column?. is there any restrictions or precondition required?

Thanks in Advance
Gokul

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