.NET How to detect if DirectX 10 is supported?

Question

I would like to find out from .NET code whether DirectX 10 is supported on the machine, preferably without using managed DirectX or XNA assemblies.

Thank you in adva

Answer 1

To check DirectX10, we're actually calling the D3DX10CheckVersion function via platform invoke.

This requires presence of the D3DX10 DLLs in the C:\Windows\System32 or C:\Windows\SysWow64 folders (platform dependent). If these are not present, then you need to install the DirectX10 Runtime on the target PC.

The actual support DirectX version / DirectX SDK version can be determined from the parameters to the P/Invoke call.

Here is the P/Invoke call:

// DX10 Supported Function
// See D3DX10CheckVersion http://msdn.microsoft.com/en-us/library/windows/desktop/bb172639(v=vs.85).aspx
[DllImport("d3dx10_43.dll", EntryPoint = "D3DX10CheckVersion", CallingConvention = CallingConvention.StdCall, SetLastError = false)]
private static extern HResult D3DX10CheckVersion(
        uint D3DSdkVersion,
        uint D3DX10SdkVersion);

public enum HResult : int
{
    S_OK = 0x0000,
    S_FALSE = 0x0001,
    E_NOTIMPL = 0x0002,
    E_INVALIDARG = 0x0003,
    E_FAIL = 0x0004,
};

bool SupportsDirectX10()
{
    // Values taken from d3d10.h to check DirectX version
    const uint D3D10_SDK_VERSION = 29;
    const uint D3DX10_SDK_VERSION = 43;

    // Checks DirectX 10 GPU compatibility with the DirectX10 runtime
    // Assumes D3DX10 DLLs present in C:\Windows\System32 or
    // C:\Windows\SysWow64 folders (platform dependent)
    HResult hResult = D3DX10CheckVersion(D3D10_SDK_VERSION, D3DX10_SDK_VERSION);
    return hResult == HResult.S_OK; 
}