do you use a win32 API refrence?

[abdul]

I thought that I ask this question...

Do you use any win32 API refrence whenever you need need to find about a certain messege or a function like this exmaple:

WM_SETICON  
wParam = (WPARAM) fType;          // icon type
lParam = (LPARAM) (HICON) hicon;  // handle of icon

In the above message, I did not know what to put on wparam and lparam so I got these informations from a win32 programmers' refrence. Do you remember all this stuff or you just look that up on the refrence file?