AplhaBlend API

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Hi *.*,

I'm using the above mentioned API to blend from a hidden picturebox to a
form (WinXP SP2). Both the picturebox and the form have the same size.
Sometimes, it works very well; it means, the function call returns
immediately, and the blending process is finished after ca. 1 sec, but
sometimes, the function call takes several 10 milliseconds, and the blending
appeares clumsy and takes about 10 sec. What happens there? I cannot find
any system...

Juergen.


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