can i get a source code for creating a user interface which actually displays a window with a mesage and 2 buttons in it
well, firstly you need to know what API you want to use. Motif? Intrinsics? pure X!? Windows? OS/2? BeOS? GTK? SDL? GLUT?! and so on.
secondly, GNU is just a s/w group. well, not even that; they’re a MOVEMENT. they move, man. yer.
er, so. you’ll need to work out what you want to do with your window (yoru ACTUAL window, not your fake window, no sir!).