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USB开发例子可以在其他语言中用API调用,有一个POwerbuilder例子

    HANDLE hDevice=OpenHIDDevice(0x1241, 0xe001, FALSE);
    
    if(hDevice)
    {
        char szBuf[9];
        szBuf[0]=0;
        OVERLAPPED  overlap;
        memset(&overlap, 0, sizeof(OVERLAPPED));   
        
        BOOL b=ReadFile (hDevice,szBuf,9,&dw,&overlap);
        if(!b) 
        {
            if(ERROR_IO_PENDING == GetLastError())
                m_ctlData.AddString("No Data");
            else AfxMessageBox("Read error!");
        }else m_ctlData.AddString("Read OK!");
		CloseHIDDevice(hDevice);