Both works now, MsPaint and Gimp formats. But they are still upside down Notice that normal perspective view has higher (+ side) Y coordinate at top of screen. My screen is set up on ortho mode this way, so upper left is 0,0:
[pascal]glViewport(X,Y,_Width,_Height);
...
glMatrixMode(GL_PROJECTION);
glLoadIdentity; gluOrtho2D(X,X+_Width,Y+_Height,Y);
glMatrixMode(GL_MODELVIEW);[/pascal]

Nice work, hope to see it finished.