confusing error (directdraw exclusive mode)

[drdave]

Hi, my name is Dave and i'm new on this forum.

I get an error when running this code, it's vb.net and directx9.

display = New Microsoft.DirectX.DirectDraw.Device(CreateFlags.Default)

 

display.SetCooperativeLevel(Me.PictureBox1, CooperativeLevelFlags.Exclusive)

 

this is the error that i get:

An unhandled exception of type 'System.ArgumentException' occurred in microsoft.directx.directdraw.dll

 

Additional information: Value does not fall within the expected range

 

if some one could help me i would be grateful.

 

best regards /DrDave

[Nerseus]

Run the following file:

c:\DXSDK\Bin\DXUtils\dbmon.exe

 

Then start your project in Debug mode in Visual Studio. The command window opened by dbmon will display a ton of information, including more detailed error messages.

 

My guess is that you're trying to make a picturebox an exclusive device and it can't be done. You can only use a form when going exclusive (fullscreen).

 

-Nerseus

[drdave]

wow, that was a fast replay! thank you :)

hmm, is there no way to beable to do a flip to transfer the backbuffer to the front, as it's faster.. ? anyways thank you ones again for your fast replay.

[AndreRyan]

The error is here:

display.SetCooperativeLevel(Me.PictureBox1, CooperativeLevelFlags.Exclusive)

It should be:

display.SetCooperativeLevel(Me, CooperativeLevelFlags.Exclusive Or CooperativeFlags.FullScreen)

Controls on forms cannot be used for fullscreen displays. If you want a Windowed app you'll need to use the Normal flag.

 

The point of using Exclusive is to have a fullscreen app but Microsoft decided to make the flags seperate to increase confusion. In DX9.Net, however, there is a FullscreenExclusive flag I think.

 

In Normal you cannot use Flip, only Blt. It's probably got something to do with being unable to rearrange Video Memory pointers whilst GDI controls the Video Card.