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= SDL_Direct3D9GetAdapterIndex =
Use this function to get the !D3D9 adapter index that matches the specified display index.


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== Syntax ==
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int SDL_Direct3D9GetAdapterIndex(int displayIndex)
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== Function Parameters ==
||'''displayIndex'''||the display index for which to get the !D3D9 adapter index||


== Return Value ==
Returns the !D3D9 adapter index on success or a negative error code on failure; call [[SDL_GetError]]() for more information.


== Code Examples ==
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You can add your code example here
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== Remarks ==
The returned adapter index can be passed to `IDirect3D9::CreateDevice` and controls on which monitor a full screen application will appear.

== Version ==
This function is available since SDL 2.0.1.

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[[CategoryAPI]], [[CategorySystem]]
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