hi. where should i put the render() function in MFC created application? i''ve tried to put it on WM_PAINT and do InvalidateRect() every th of second. but this means i PREdetermined the FramePerSecs which is i not really like. or should there any extra job to do this? currently for testing purposes my render() only consist of m_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(m_R,m_G,m_B), 1.0f, 0 ); m_pd3dDevice->Present( NULL, NULL, NULL, NULL );

Methinks: UpdateWindow is faster than Invalidate because UpdateWindow sends WM_PAINT directly rather than simply marking area for repainting when next WM_PAINT arrives...

OnIdle is probly best in your case. I personaly use a timer (I use a flag to keep it from trying to go to fast on slow machines) because I am (trying) to use DirectX to make an drawing program, and I don''t want to use up all the CPU time (I want to share with other apps).

In C++ .NET you can use a while ( 1 == 1 ) loop and do a render than pump and event (System::Windows::Forms::Application::DoEvents();
This is best IMO if you are writting a real time game etc.

Thank you for your time,
Arrummzen