VC 搜索本地可用串口

最简单的方法：枚举

复杂一点的办法：参考驱动开发，查看系统设备的符号表。

typedef struct tagPT_PortsArry

{

int nPortIndex[256];

bool bEnable[256];

}PT_PortsArry, far *LPT_PortsArry;

//------------------------------------------------------------------------------------------------

int QueryComPorts(LPT_PortsArry ptPortsArry)

{

HANDLE hCom;

char cPortName[128];

int i;

int nPortsCount = 0;//串口个数

if (ptPortsArry == NULL)

return -1;

for (i = 1; i <= 256; i ++)

{

sprintf (cPortName, "COM%d", i);

hCom = CreateFile (cPortName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);

ptPortsArry.nPortIndex[i - 1] = i;

if (hCom == INVALID_HANDLE_VALUE)

{

ptPortsArry.bEnable[i - 1] = FALSE;

}

else

{

ptPortsArry.bEnable[i - 1] = TRUE;

CloseHandle (hCom);

nPortsCount ++;

}

}

return nPortsCount;

}