判断U盘是否可写

#include <stdio.h>
#include <windows.h>
#include <winioctl.h>

int main(void)
{
	HANDLE hFile = CreateFile("\\\\.\\G:",GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,0,NULL);

	DWORD temp;
	BOOL bRet = DeviceIoControl(hFile,IOCTL_DISK_IS_WRITABLE,NULL,0,NULL,0,&temp,NULL);

if (!bRet)
	{
		printf("Error code:%x\n",GetLastError());
	}

return 0;
}