Probems with changing resolition

I cant seem to find any solution to this, so any help is *greatly* appreciated! I have programmed a game, and as the game starts it tries to change the screen resolution, to avoid the desktop icons to be messed up, the change is not broadcast, it never leaves the "test" state. Something like this:

DevM.dmPelsWidth = 640
DevM.dmPelsHeight = 480
DevM.dmBitsPerPel = Bits '(can be 4, 8, 16, 24, 32)
ChangeDisplaySettings(DevM, CDS_TEST)

On 90% of the target computers, this works perfectly, on the remaining 10% (Seemingly a lot of GeForce users) this messes up, the resolution gets much smaller than the specified one and the controls seems to contain their original states..

ANYONE?? :-)

Welcome to windows :)

This is what all game programmers have to deal with. There is no one way that will work for everyone. You will have to either design in some alternate functions for troublesome configurations, or test for compatability upon installation, and warn the user.

Have fun...

Hai,

I written like this in vc++, but it shows error on DevM in ChangeDisplaySettings(DevM, CDS_TEST); I don't why? Would You please send a sample code for me, depending upon the width and height how can i set the screen resolution.

Thanks and regards


Snippet:
DEVMODE DevM;
DevM.dmPelsWidth = 640;
DevM.dmPelsHeight = 480;
DevM.dmBitsPerPel = 32;// '(can be 4, 8, 16, 24, 32)
ChangeDisplaySettings(DevM, CDS_TEST);

Hallo FiksVe,

you may try this code from Planet source code

This post is over two years old, the game has been commersially released, and has sold about 2000 copies.. :confused:

Anyway, in case somebody was wondering what my problem was, it was the DPI setting in windows. If the user changes the big fonts setting, the screenmetrics gets all fu*#ed up.

This is probably my last post (I havent posted the last year) as I have migrated all of my development to C/C++. Maybe we see each other some time in a different forum :wave:

Cheers,

Fiksve