Thread: Explanation!!!

i am new in window programming. can i ask u something about this?

what is Hwnd?
what is Hdc HDC?

Wparam,wm_paint,wm_char!!! that is far i asked first.
can i have some good explanation on this?
plss...
))
why we need the HDC?

couldn't have said it better, you just missed what a handle is:

a handle is basically a number used to access a window, a device context, or even an application.

Oskilian

hi,zen.
i think u have given me a good explanation.
but..what can we do with the lparam and wparam?
i am still confious in that matter.

pls help me out with this.Thanks.
where can i learn more in here?
show me the way.... ))

When you create an application/program it has a HINSTANCE. This is the HWND to the program.
Each window or dialog in the program has a HWND(as do the controls on the dialog/windows).
When Windows gets a message for your program it is passed to a special function, a CALLBACK.
Here you write a complicated SWITCH/CASE statement to handle the different types of messages(ie WM_PAINT to redraw the screen)
Additional information is passed with the message, WPARAM and LPARAM. Depending on what message, you determine what happened.
for example if the user resized the window the following would be your code

Code:

//*******************************
case	WM_SIZE://size message
cxSize=(int)(LOWORD(lParam));//get the new width
cySize=(int)(HIWORD(lParam));//get the new height
RePaintView(hWnd,cxSize,cySize);//do the resize in your function
break;
//*******************************