C# Signature:

[DllImport("user32.dll")]
static extern bool DrawAnimatedRects(IntPtr hwnd, int idAni,
   [In] ref RECT lprcFrom, [In] ref RECT lprcTo);

User-Defined Types:

IDANI_

Notes:

Only the IDANI_CAPTION constant will result in any animation. Any other constants have not been implemented on any Windows platform!

Tips & Tricks:

Since only IDANI_CAPTION is implemented, to get the effect of IDANI_OPEN, simply swap the lprcFrom and lprcTo rectangles, but still specify the IDANI_CAPTION constant.

Sample Code:

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Alternative Managed API:

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