Problem with C++ function
- From: "Ian D. Nichols" <inich@xxxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Sat, 29 Aug 2009 12:13:07 -0400
Hi Listers,
I am trying to superimpose a RichEdit control onto the main program window
and cannot get a call to the SetWindowLong function to compile properly. I am
following an assembler example that assembles and works flawlessly, but keep
getting an error with the C++ version of it.
This assembles without error:
invoke SetWindowLong, hRichEd, GWL_WNDPROC, hEditProc
This is the C++ version:
SetWindowLong (hRichEd, GWL_WNDPROC, hEditProc);
According to a reference of Windows APIs, the 3rd parameter is of type long and
is the procedure that handles keystrokes sent to the rich edit control. If I
don't cast it the compiler complains that it cannot convert void to int. If I
cast it to (long), the compiler complains that it cannot convert long to long
(__stdcall *)(HWND__ *,unsigned int, unsigned int,long)
I don't understand the meaning of the parameter list in this error message.
Could this be a bug in the Borland compiler version 5.4, or am I just not
spotting something that's wrong.
Thanks in advance.
Ian
Ian D. Nichols,
Toronto, Canada
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