I use DOSbox with the DFend GUI system, and it works fine unless I want to start the game in full screen. My resolution is usually the 1024x780, so it shouldn't be a problem right? Any help on this? :-\

You want to run a game in DosBox in a fullscreen?

Dosbox fullscreen:
Press alt+enter.

ALT + ENTER causes the DosBox to freeze up and then crash. As does setting DFend to start in Full Screen Mode.

i always do "alt + enter" to go Fullscreen @ dosbox and it works fine...... don't know why you have problems....

try changing the output setting of dosbox.

Edit the config? fullscreen = false
and then chande it to
fullscreen = true

change the `render method` setting

I've tried all rendering methods, still crashes, no matter which game I'm playing. Master of Orion, Sensible Soccer, Police Quest, etc..

try getting the latest drivers for your videocard.
i cant really think of whats wrong