[win32] - super class: how get the window procedure?

[joaquim]

i'm having problems for do the form super class
the window is showed and window procedure works, but i don't get some messages, like WM_CREATE(and maybe more), so how can i fix these problem?
i used my button class code(changed for the form class), but without results
can nayone advice me, please?

[joaquim]

speaking on EnumChildWindows(), CreateWindowEx() functiond that we can send the 'this'(when used inside of a class)...
these functions are connected to another CALLBACK functions.
how can i get the class pointer inside of CALLBACK functions?

[vart]

You would use SetWindowLongPtr/GetWindowLongPtr functions

[Codeplug]

Puting win32 callbacks into a class

gg

[joaquim]

Puting win32 callbacks into a class

gg

sorry but some links aren't working

You would use SetWindowLongPtr/GetWindowLongPtr functions

sorry... but how use them for get the pointers?
i have seen these incomplete sample:

MyClass *pWnd=(MyClass*)GetWindowLong(...);

but i don't understand what to put on parameters

[joaquim]

now i understand better how can resolve the problem

1 st - when we create the control, we must send the 'this' in last parameter:

 hwnd = CreateWindowEx(0 , classname, strCaption.c_str(), WS_OVERLAPPEDWINDOW | WS_TABSTOP,
                                  CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, parent, NULL, hinstance, this);

2 nd - in window procedure we create the pointer variable:

form *inst = (form *)GetWindowLongPtr(HandleWindow, GWLP_USERDATA);

3 rd - we must use the WM_NCCREATE message:

case WM_NCCREATE:
                {
                    CREATESTRUCT *p = (CREATESTRUCT *)lParam;
                    inst = (form *)p->lpCreateParams;
                    SetWindowLongPtr(HandleWindow, GWLP_USERDATA, (LONG_PTR)inst);
                    inst->hwnd = HandleWindow;
                }
                break;

now we can use the class members using the inst pointer
i hope these helps very people

[Codeplug]

WM_NCCREATE is not always the first message sent, which is one reason I like thunking better.

I posted exampled 32 bit example code here: Member functions as child window procedures

gg

[joaquim]

WM_NCCREATE is not always the first message sent, which is one reason I like thunking better.

I posted exampled 32 bit example code here: Member functions as child window procedures

gg

i'm confused.. what you mean?
i need ask anotherthing: what i must do, in window procedure(speaking on form), for the child controls window procedure do the notify messages?
i tryied these:

case WM_COMMAND:
                {
                    return DefWindowProc(HandleWindow, WM_COMMAND, wParam, lParam);
                }
                break;

no error, but don't works
i tryied with:

SendMessage(HandleWindow, WM_COMMAND, wParam, lParam);

but when i click on child controls, the windows(OS) give me an error and then the aplication is closed... what you can advice me?

[joaquim]

resolved.. my problem was using the form hwnd instead the control hwnd...

case WM_COMMAND:
                {
                    return DefWindowProc((HWND)lParam , WM_COMMAND, wParam, lParam);
                }
                break;

the (HWND)lParam give us the control hwnd.
thanks for all