Thread: Why typecast with HBRUSH in the WNDCLASS

When I/you declare the fields of the WNDCLASS, the one of them is hbrBackground. Well, the way petzold told me to set the background of the window class is this:

Code:

wndclass.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);

Why do you need to typecast with the HBRUSH type?

Thanks.

--Garfield

because GetStockObject() returns a HGDIOBJ and we need a HBRUSH hence the cast.

Thanks for the explanation!

--Garfield

Compilers whould warn this it but they shouldn't give an error. I mean, both HBRUSH and HGDIOBJ are DWORDs (There are only three regular datatypes in the world!).