[RESOLVED] Posting Messages

I have a thread which sends user defined messages to another window.

How can I get it to send a text string?

For example, the window which receives a certain message has a static text control which I would like to update.

At the moment I have derived a series of CONSTANTS and sent those. Then the message handler sets the text according to which CONSTANT was received.

There must be a more flexible approach.

I hope someone can help.

In the thread you can send the message using something like:

CString sendstring = _T("Send this text");
char *lpszPostedBytes = (char *) LocalAlloc(LPTR,sendstring.Length() + 1);
if (lpszPostedBytes != NULL)
{
strcpy(lpszPostedBytes, (LPCTSTR) sendstring);
PostMessage(myWnd, YOUR_MESSAGE, (LPARAM) lpszPostedBytes, 0L);
}

Then release the memory when the message been processed using:
LocalFree();

I HAVE done this before...
I did Send Message() ;
I didnt find the necessity for any user defined messages
U can instead adhere to WM_SETTEXT
It worked perfectly

SendMessage to main app from a thread is DANGEROUS. It can cuase dead locks. Don't do it!

Hi, thanks for your sample code.

I've added it in, but have one problem. How to I do when the message has been processed so that I can call LocalFree()?

LocalFree is called on the receiving side

Sally

Hi Sally

I've tried putting LocalFree(var) into the message handler function, but it doesn't like the parameter being passed which is now a LPARAM.

Any ideas?

LocalFree((char*) var)?

Sure, for some strange reason I couldn't log in today.....

you have to cast the LPARAM to the correct datatype to be freed

Sally