nvapi force discrete card

nvapi_force_discrete_card.cpp

void nvidiaForceUseDiscreteCard()
{
	NvAPI_Status status = NvAPI_Initialize();
	if(status != NVAPI_OK) return;

	NvDRSSessionHandle hSession = 0;
	status = NvAPI_DRS_CreateSession(&hSession);
	if(status != NVAPI_OK) return;

	status = NvAPI_DRS_LoadSettings(hSession);
	if(status != NVAPI_OK) return;

	NvDRSProfileHandle hProfile = 0;
	status = NvAPI_DRS_GetBaseProfile(hSession, &hProfile);
	if(status != NVAPI_OK) return;

	NVDRS_SETTING drsSetting1 = {0};
	drsSetting1.version = NVDRS_SETTING_VER;
	drsSetting1.settingId = SHIM_MCCOMPAT_ID;
	drsSetting1.settingType = NVDRS_DWORD_TYPE;

	NVDRS_SETTING drsSetting2 = {0};
	drsSetting2.version = NVDRS_SETTING_VER;
	drsSetting2.settingId = SHIM_RENDERING_MODE_ID;
	drsSetting2.settingType = NVDRS_DWORD_TYPE;

	NVDRS_SETTING drsSetting3 = {0};
	drsSetting3.version = NVDRS_SETTING_VER;
	drsSetting3.settingId = SHIM_RENDERING_OPTIONS_ID;
	drsSetting3.settingType = NVDRS_DWORD_TYPE;

	drsSetting1.u32CurrentValue = SHIM_MCCOMPAT_ENABLE;
	drsSetting2.u32CurrentValue = SHIM_RENDERING_MODE_ENABLE;
	drsSetting3.u32CurrentValue = SHIM_RENDERING_OPTIONS_DEFAULT_RENDERING_MODE;

	status = NvAPI_DRS_SetSetting(hSession, hProfile, &drsSetting1);
	if(status != NVAPI_OK) return;

	status = NvAPI_DRS_SetSetting(hSession, hProfile, &drsSetting2);
	if(status != NVAPI_OK) return;

	status = NvAPI_DRS_SetSetting(hSession, hProfile, &drsSetting3);
	if(status != NVAPI_OK) return;

	status = NvAPI_DRS_SaveSettings(hSession);
	if(status != NVAPI_OK) return;

	NvAPI_DRS_DestroySession(hSession);
	hSession = 0;
}