Resizing MDI child windows

In an MDI MFC app, I load up bitmaps to display in child windows. I want to resize the child windows so that the bitmaps fit nicely in. The bitmaps are loaded from their files in CDocument::Serialize(). I was wondering, when is the best time to resize the child windows to fit the bitmaps?

The best time to resize the window is before drawing the bitmap on the screen. Determine its size, resize the MDI child window, and then draw it.

Kuphryn

But that means I have to resize each time I draw the bitmap. That will slow my program down.

I ended up putting the code in the WM_INITIALUPDATE message handler. Works fine now.

This might help....

Code:

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//Rect is filled with bitmaps dimension,
//use GetObject() if the bitmaps width and height are not known

//get the styles from the window
lStyle=GetWindowLong(hWnd, GWL_STYLE);
lExStyle=GetWindowLong(hWnd, GWL_EXSTYLE);

//send in the required client area and styles
AdjustWindowRectEx(&Rect, lStyle, bHasMenu, lExStyle);

//returned is the required window size so set the window to this size and bring to the front
SetWindowPos(hWnd, HWND_TOP, 0,0,Rect.right- Rect.left, Rect.bottom- Rect.top, SWP_NOMOVE);

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Cheers, that's how I was doing it. It doesn't work 100% though, because the window that the bitmap is drawn to is actually a child window of the MDI ChildFrame, and thus the dimensions are a few pixels different. What I might do though is use GetWindowRect() on each window to calculate the exact dimensions required.