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SetDisplayMode problems

Started by Psychocatt Sep 12, 2000 at 12:06 PM 2 replies 600+ views

Original Post

Sep 12, 2000 at 12:06 PM

I don''t know if this is a DX or compiler issue, so I try here first. When ever I try to compile my code, I get a ''SetDisplayMode does not take 5 param'' error. Now, I have looked into the DirectX help documents and unless I don''t know how to read, SetDisplayMode DOES take 5 parameters. Now, I played around with it and tried taking out the last two parameters. It compiles when I do that, but then DirectX returns with an Invaild Param error. I am using the 6.0 SDK. I just upgraded my video drivers and it looks like I have DX 7.0 runtime installed. Could there be some problems having it set up like this? Any clues? Thanks

ComputrJam

Sep 12, 2000 at 12:15 PM

Hmm, SetDisplayMode does take 5 parameters. And I don''t think having DX7 runtime will be a problem. Can you post some of your code?

Psychocatt

Author

Psychocatt

Sep 12, 2000 at 12:21 PM

Opps... I figured out what it was. I was using QueryInterface to get the version 4 of DD, but I was using a pointer to version 1 to hold it. Here is what I had

LPDIRECTDRAW lpDD; // Actual DD Object
LPDIRECTDRAW lpDDT; // Temp DD object

DirectDrawCreate(NULL,&lpDDT,NULL);
lpDDT->QueryInterface(IID_IDirectDraw4,(LPVOID *)&lpDD);
lpDD->SetDisplayMode(640,480,8,0,0);
// Using the prototype for ver.1, but the function for ver.4

Thanks for the quick reply though!

ComputrJam

Sep 12, 2000 at 12:23 PM

LOL, I''ve done that exact same thing before...

Glad you found your problem, there will be many more!

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