Semi-transparent drawing

[Nuri Ismail]

I am using Microsoft visual c++ 6, and I want to draw shapes on a view. What i want is a displayed shape with a semi-transparent color i.e. we should still be able to see whatever is beneath the shape. Can anyone help me? Thanks.

[Mark Salsbery]

You could use GDI+[^]

// (GDI+ initialization omitted)

// Draw a red line from 0,0 to 400,400 with 25% opacity
Gdiplus::Graphics g(hwnd, 0);
Gdiplus::Pen p(Color(64, 255, 0, 0), 10); // alpha value 64
g.DrawLine(&p, 0, 0, 400, 400);

Mark Salsbery Microsoft MVP - Visual C++ :java:

[Nuri Ismail]

Thank you very much for your answer! :) It works fine, thanks again!

[vikas amin]

you need to understand and use Alpha Blend http://www.codeproject.com/KB/winsdk/quaker1.aspx[^] this is a .net application does exactly what you need http://www.codeproject.com/KB/GDI-plus/alphafx.aspx#TOC3[^]

Vikas Amin

My First Article on CP" Virtual Serial Port "[^]

modified on Thursday, July 24, 2008 5:33 PM