If I know I want my view's drawable region to be 100 x 100, how do I make it so? I am guessing that I need to have the parent-frame do SetWindowPos, and then that will automatically resize the view after resizing the frame. But how do I figure out how big the parent frame needs to be?

Try this in CMyView:

// Get the parent frame window. This CWnd function searches up the // parent chain until a CFrameWnd (or derived class) object is found. CFrameWnd *pFrame = GetParentFrame(); // Get the size of the client portion of the window. CRect cRect; pFrame->GetClientRect( &cRect ); // Get the size of the entire window. CRect wRect; pFrame->GetWindowRect( &wRect ); // Calculate the new window size by subtracting out the client // size, and adding 100 (we want the *client* area to be 100). wRect.right = wRect.right - cRect.Width() + 100; wRect.bottom = wRect.bottom - cRect.Height() + 100; // Now resize the window. Ta-da! pFrame->SetWindowPos( NULL, 0, 0, Rect.Width(), wRect.Height(), SWP_NOZORDER | SWP_NOMOVE);

Source code is provided for instructional purposes, and is released to the public domain. No claim of ownership is made. Use it at your own risk. No warranties are expressed or implied. The resulting program may not be fully functional. No animals were used to test this code.