c++winusbsetupapi

Getting error 87, incorrect parameter for SetupDiGetDeviceInterfaceDetail

I keep getting the Windows error 87 while calling the SetupDiGetDeviceInterfaceDetail (https://msdn.microsoft.com/en-us/library/ff551120.aspx), I keep getting the error even when I switch all the optional parameters to NULL, but I use the two first parameters in another function which works, so I don't understand what's incorrect about them.

HDEVINFO hdiInfo = SetupDiGetClassDevsW(&guid, NULL, NULL, 0x12);

SP_DEVICE_INTERFACE_DATA hidDevIData = SP_DEVICE_INTERFACE_DATA();


hidDevIData.cbSize = sizeof(hidDevIData);
bool isValid = SetupDiEnumDeviceInterfaces(hdiInfo, 0, &guid, i, &hidDevIData);

if (isValid)
{
    DWORD dwLength;
    PSP_DEVICE_INTERFACE_DETAIL_DATA hidDevIDetailData = PSP_DEVICE_INTERFACE_DETAIL_DATA();
    hidDevIData.cbSize = 8;
    hidDevIDetailData = new SP_DEVICE_INTERFACE_DETAIL_DATA();
    hidDevIDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);

    SetupDiGetDeviceInterfaceDetail(hdiInfo, &hidDevIData, NULL, 0, &dwLength, NULL); //ERROR 87 : ERROR_INVALID_PARAMETER
}

I really don't know which parameter could be incorrect, as all the previous functions returns true (so the GUID is valid for example).

Solution

  • For those struggling with the same issue, you just have to put the cbSize to sizeof(object):

    hidDevIData.cbSize = sizeof(hidDevIData);
hidDevIDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);