RE: [Dev-C++] What's wrong with this code?

Ok, I was wrong about the menu.
But Carlos, the WNDCLASS struct does not have a cbSize member. Thats =
the
WNDCLASSEX.

What is wrong about the code is -not- in WinMain, (although there =
should be
a ; after CreateWindow()) but in WndProc().
You have to put one more return statement:
In your old code you always return zero.
This is wrong for for instance the WM_NCCREATE message, this will =
prevent
your window from being created.



LRESULT CALLBACK WndProc(HWND handle, UINT msg, WPARAM wp, LPARAM lp) {
 switch(msg) {
  case WM_DESTROY:      // close
  PostQuitMessage(0);
  break;
=20
  default:        // default
  ->return<- DefWindowProc(handle,msg,wp,lp);
 }
=20
 return 0;
}

Jaap.

> -----Original Message-----
> From: Carlos Garc=EDa del Monte [mailto:cg...@wo...]
> Sent: Wednesday, November 27, 2002 12:10 PM
> To: dev-cpp-users-list
> Subject: Re: [Dev-C++] What's wrong with this code?
>=20
>=20
> TCHAR is one character never a string. For a string use=20
> either TCHAR* or LPTSTR.
> (Pointing about an answer by Marc Heiliger)
> Answering to Jaap, it's not needed to give a menu, you can=20
> use NULL if you don't
> want have one. That's just the default code for a window app=20
> and it works,
> giving a window with nothing.
> The answer is that you are not initializing the cbSize field=20
> of the WNDCLASS
> structure, you must initialize it so when the program watches=20
> at it it can use
> the memory space needed. You must add this line:
> wndclass.cbSize =3D sizeof(WNDCLASS);
> Remember this, always you need to use an structure you have=20
> ALWAYS to fill a
> member of it which is the size of the structure with=20
> structure.sizeMember =3D
> sizeof(STRUCTURE); The structures never know what's its own=20
> size, so you must
> provide it with that member.
>=20
> The answer can be too in the line, but I'm almost sure it is=20
> defined in the
> header, however I say it:
>  wndclass.lpfnWndProc =3D WndProc;
> This member of the struct defines which is the window's=20
> callback function, which
> must have been defined before, but it is not defined, at=20
> least in this file.
> Add at the begin of it the line
> LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
> And some place after in the file write the function.
> LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam,=20
> LPARAM lParam);
>=20
>=20
>=20
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>=20