Hello,

In VS2005, I have a subclassed Picture Control (CStatic) where I can draw lines by left-button clicking, holding, and moving the mouse.

But now, I want to click over one of those lines and "drag it" by just moving the mouse. Is it possible only by using MFC, or I should use other libraries like OpenGL ?

Thanks !

My guess is that you draw the lines in the MouseMove or MouseDown/Up event handlers? What you'll want to do instead of drawing them there, draw them in the OnPaint event handler. In the Mouse handlers, simply save the coordinates in a data structure and in the OnPaint handler, draw every line. This way, you now have the coordinates and you can choose to alter them to move a line. Does this make sense?

how can i draw a line in opengl with mouse click and drag