Thread: Window problem

I have an edit box/window and when I press enter/return, I want it to clear the edit box/window, kind of like a command prompt. I would appreciate any help.

Look up the WM_SETTEXT message.

No, clearing the edit box is'nt the problem. The problem is doing it when one presses enter/return.

I already know about the WM_KEYDOWN message.

How can inplement another message procedure for the edit box so that I can handle such messages as WM_KEYDOWN ?

Thanks in advance.

In your message switch, look for when enter is pressed. Then check which window has focus. If it is the edit, send a WM_SETEXT message with the info you want.

Ok, but how do you check which Window has focus?

GetFocus() returns the handle of the window that has focus. I bet you could have guessed that this is the function that you would use

WNDPROC OldEditProc;

LRESULT CALLBACK MyEditProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {

switch (message) {
case WM_KEYDOWN:

....

break;
}

return CallWindowProc (OldEditProc, hWnd, message, wParam, lParam);
}


You may process the keystrokes in your own wndproc, called here MyEditProc. The edit box must exist (hWndEdit is valid)
to do the subclass.

OldEditProc = (WNDPROC) SetWindowLong (hWndEdit, GWL_WNDPROC, (LONG) MyEditProc);