Problem with GetWindowRect returning strange dimensions

[adrian maull]

I'm using the GetWindowRect in my screen capture utility:

[DllImport("user32.dll")]
private static extern bool GetWindowRect(IntPtr hwnd, ref Rect rectangle);

My Rect Struct:

[StructLayout(LayoutKind.Sequential)]
public struct Rect
{
public int left;
public int top;
public int right;
public int bottom;

public int Width
{
get{return right - left;}
}

public int Height
{
get{return bottom - top;}
}
}

I need to call GetWindowRect to get the dimensions of the window in
question, do other stuff, and eventually I call BitBlt to create the
screenshot.

Having said that, the code works fine. But I've noticed that I was getting
errors getting screen shots of MSDN Library and the VB6 development
environment. I found out that the problem is that the GetWindowRect call is
returning the same value for left and right in the Rect (resulting in 0
width), and the same value for top and bottom (resulting in 0 height) when I
send in the handle to these windows. It's definitely odd because this code
works just fine with other windows...

Any one ever experienced this before?