Unable to change the windows background color

Hi there,

well I'll just get to the point:
I tried two methods,

Code:

---

SetClassLong(hwnd, GCL_HBRBACKGROUND, (LONG)CreateSolidBrush(RGB(255,255,255)));
InvalidateRect(hwnd,0,TRUE);

---

and

Code:

---

case WM_ERASEBKGND:
{
        HDC hdc;
        RECT rc;
        hdc = (HDC)wParam;
        GetClientRect(hwnd,&rc);
        FillRect(hdc,&rc,(HBRUSH)CreateSolidBrush(RGB(255,255,255)));
        return 0;
}

---

Both methods leave my client area windows-grayish, also when I refresh/update/redraw the window.

I use CreateDialog with resources to create my window handle.

Code:

---

STYLE DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU | DS_3DLOOK
EXSTYLE WS_EX_APPWINDOW

---

Maybe I just forgot a style needed to change background? Can anyone give advice? Tell me if you need the full code.

Thanks in advance, Hawk.

This page might help [URL="http://www.winprog.org/tutorial/dlgfaq.html"]. I prefer to not to use resources as they prevent the window from being able to resize, even though the background colour defaults to white.

Thanks, this method works :D

I don't think I can change my style of creating windows, because I've gotten used to it and it's still the fastest way to add stuff to my programs...

I just set the WS_THICKFRAME style and had to notice that my code in WM_PAINT stopped BitBlt-ing. Well I need to find a way around that when I come to writing a program which profits from being able to be resized.

Sorry to butt in....

>>FillRect(hdc,&rc,(HBRUSH)CreateSolidBrush(RGB(25 5,255,255)));

This is a GDI leak. You have allocated memory for the GDI object but not deleted it.

Unless you are using a .NET version IDE, this will crash your app.
[ie in MSVC v6 this is a leak, but in MSVC 2002 (or later) all GDI objects created as 'default' and so auto cleaned up by system]


In this case (as the brush was not selected into a Device Context);
Create the GDI object
Use GDI object
Clean up with DeleteObject()

OR

Use a 'Stock' object (which does not require deletion)
GetStockObject(WHITE_BRUSH);



If you use SelectObject() always catch the returned GDI object (currently selected or default).
Use.
Return to original GDI objects.
Clean up (RestoreDC(), DeleteDC(), DeleteObject() etc)