Q 1) How do I create a transparent overlay with the VCLEdit

A) The standard VCL uses GDI which has no native support for transparency or antialiased drawing. You'll need to use an external library, such as:


or a commercial library such as

DtpDocuments at

You can also do transparent overlays using the GDI directly with the AlphaBlend() GDI function.

Q 2) How do I draw antialiased lines or shapesEdit

A) See the answer for question 1

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