Is my handle to device invalid and or is it not compatable with COM programming functions

#include <windows.h>
#include <SetupAPI.h>
#include <stdio.h>
#include <stddef.h>

GUID GUID_DEVINTERFACE_USB_DEVICE = {0xA5DCBF10, 0x6530, 0x11D2, {0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED}};

HANDLE webcam = NULL;

/*
 *	get device media information with IO control
 */
void UseDeviceIoControl(HANDLE hwebcam)
{
	DWORD sizeOfgCP = 0;
	OVERLAPPED oLap = {0};
	if (DeviceIoControl(hwebcam, IOCTL_CHANGER_GET_STATUS, NULL, 0, NULL, 0, &sizeOfgCP, &oLap) != 0)
	{
		printf("Getting CHANGER_GET_STATUS worked %d\n", sizeOfgCP);
	}
	else
	{
		printf("Getting CHANGER_GET_STATUS failed. error %d\nRequired Size %d\n", GetLastError(), sizeOfgCP);
	}
	DCB webcamDCB;
	if (GetCommState(webcam, &webcamDCB) != 0)
	{
		printf("Getting GetCommState worked! baud rate is %d\n", webcamDCB.BaudRate);
	}
	else
	{
		printf("Getting GetCommState failed %d\n", GetLastError());
	}
}

int main(void)
{
	HDEVINFO webdevices;

	if ((webdevices = SetupDiGetClassDevs(&GUID_DEVINTERFACE_USB_DEVICE, NULL, NULL, (DIGCF_PRESENT | DIGCF_DEVICEINTERFACE))) != NULL)
	{
		printf("SetupDiGetClassDevs Worked!!\n");
	}
	else
	{
		printf("SetupDiGetClassDevs didn't work error %d\n", GetLastError());
	}
	SP_DEVINFO_DATA webDevInfoDat;
	webDevInfoDat.cbSize = sizeof(SP_DEVINFO_DATA);
	SP_DEVICE_INTERFACE_DATA webInterDat;
	webInterDat.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);

	int i=0;
	SetupDiEnumDeviceInfo(webdevices, i, &webDevInfoDat);

	BOOL sdei;
	while (TRUE == (sdei = SetupDiEnumDeviceInterfaces(webdevices, NULL, &GUID_DEVINTERFACE_USB_DEVICE, i, &webInterDat)))
	{
		printf ("Device%d) ", i);
		PSP_DEVICE_INTERFACE_DETAIL_DATA_A pwebInterDetDat = NULL;
		DWORD interDetSiz = 0;
		DWORD reqInterDetSiz = 0;
		DWORD err = SetupDiGetDeviceInterfaceDetail(webdevices, &webInterDat, pwebInterDetDat, interDetSiz, &reqInterDetSiz, &webDevInfoDat);
		if (ERROR_INSUFFICIENT_BUFFER != GetLastError())
		{
			printf("SetupDiGetDeviceInterfaceDetail failed!\n");
			ExitProcess(1);
		}
		pwebInterDetDat = malloc(reqInterDetSiz);
		pwebInterDetDat->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA_A);
		interDetSiz = reqInterDetSiz;
		if (SetupDiGetDeviceInterfaceDetail(webdevices, &webInterDat, pwebInterDetDat, interDetSiz, &reqInterDetSiz, &webDevInfoDat))
		{
			printf("Interface Detail Data\nDevicePath: %s\nRequired Size: %d\n", pwebInterDetDat->DevicePath, reqInterDetSiz);

		}
		else
		{
			printf("Getting SetupDiGetDeviceDetail error %d RequiredSize %d\n", GetLastError(), reqInterDetSiz);
		}
		webcam = CreateFile(pwebInterDetDat->DevicePath, (GENERIC_READ | GENERIC_WRITE), 0, NULL, OPEN_EXISTING, 0, NULL);
		if (webcam == INVALID_HANDLE_VALUE)
		{
			printf("Creating File didn't work %d\n", GetLastError());
		}
		else
		{
			printf("Creating File did work\n");
			if (pwebInterDetDat->DevicePath[13] != '9')
			{	//to make sure it is the camera
				CloseHandle(webcam);
			}
			else
			{
				printf("save this file\n");
				UseDeviceIoControl(webcam);
				break;
			}
		}
		printf("\n");
		i++;
		webInterDat.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
		free(pwebInterDetDat);
	}
}