Need help on ownerdrawn windows in Lister plugin

[Lefteous]

ListNotificationReceived is called when the parent window receives a notification message from the child window: WM_COMMAND, WM_NOTIFY, WM_MEASUREITEM or WM_DRAWITEM

I can't get it to work. The child control has a valid ownerdraw style. I never receive a WM_DRAWITEM or WM_MEASUREITEM message in ListNotificationReceived.
Standard drawing works fine.
Could someone please help me. A working example would be fine.

[SCHMaster]

It is necessary to substitute wndproc
OldProc := Pointer(GetWindowLong(ListerHandle,GWL_WNDPROC));
SetWindowLong(ListerHandle, GWL_WNDPROC, Longint(@NewWndProc));
and process new wndproc
function NewWndProc(hWindow: HWND; message: UINT; WParam: WPARAM;
LParam: LPARAM): LRESULT; stdcall;
begin
...
end;
See Win32 API Help.

[Lefteous]

2SCHMaster

Thank you for reply!

Are you sure that subclassing is the right way here? As far as I know WM_MEASUREITEM and WM_DRAWITEM are always sent to the parent window of the ownerdrawn control and I thought the lister window handler calls ListNotificationReceived when receiving WM_MEASUREITEM or WM_DRAWITEM.

[Lefteous]

Thanks to Mr. Ghisler the problem is solved in TC 6.02.