DirectDraw Resolution Problem

[bobby23]

I am using directdraw for programming a graphics game, I have 2 characters. I have a problem as when I use resoultionb of 1024 * 768, the game still shows up at 800 * 600, but to make make up for the excess screen there is a white band of flashing screen around the game . So in other words the game screen is reduced and dosent take up the whole screen. Also when I use 800 * 600 resoultion it works fine. 640 * 480 works too but anything greater than 800 *600 dosent work. Anyone know what the problem is?

[Machaira]

Maybe if you showed us the relevant code we could offer some advice.

[Electroman]

Could just be ur PC, but if you can run windows in 1024*768 there shuldn't be a problem. Have you tried this to check its a valid display mode:

Private DModes As DirectDrawEnumModes
Private rModeCount as Long
Private rModes() as string
 
Dim Temp As DDSURFACEDESC2
    Set DModes = DDraw.GetDisplayModesEnum(DDEDM_DEFAULT, Temp)
    
    rModeCount = DModes.GetCount
    ReDim rModes(1 To rModeCount)
    For i = 1 To rModeCount
        DModes.GetItem i, Temp
        rModes(i) = CStr(Temp.lWidth) & "x" & CStr(Temp.lHeight) & "*" & CStr(Temp.ddpfPixelFormat.lRGBBitCount)
    Next

Hope that will help you.