Reading pixel from another application

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#9252

From: Henry
Date: Tue, 20 Jul 2004 15:18

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Hi to all!

I am working on a supervisor program that waits for an area within another
application to become red. As a first solution I tried the following code:

 HDC dc;
 Graphics::TCanvas ScreenCanvas;

 ScreenCanvas = new Graphics::TCanvas();
 dc = GetDC(NULL);
 ScreenCanvas->Handle = dc;

 If (ScreenCanvas->Pixels[_DNS_Mike_St_X_Coord_][_DNS_Mike_St_Y_Coord_] ==
clRed)

which worked correctly. My problem is: what if the target windows is covered
by another windows or it is minimized ? Is there an API to be used to
directly read pixel from another application? Can anybody provide me with a
piece of code ?
Thank un advance.

Henry - Italy

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Subject: Reading pixel from another application
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