WNET协议应用

 结束一网络连接

            
                                     第八节: 结束一网络连接

结束一网络资源的连接可用函数WNetCancelConnection2 .

DWORD dwResult;
 
dwResult = WNetCancelConnection2("z:",
    CONNECT_UPDATE_PROFILE, // 从PROFILE中删除连接
    FALSE);                 //
 
if (dwResult == ERROR_NOT_CONNECTED)
{
    TextOut(hdc, 10, 10, "驱动器 z: 没有连接.", 23);
    return FALSE;
}
 
else if(dwResult != NO_ERROR)
{
   
    NetErrorHandler(hwnd, dwResult, (LPSTR)"WNetCancelConnection2");
    return FALSE;
}

TextOut(hdc, 10, 10, "连接被关闭 驱动器z:.", 25);

;====汇编语言描述(BY 谢小荣)=====
AsmCancelWNetConnection PROTO :DWORD,:DWORD
.data
     msg_cancelwnet_2 db "此驱动器没有连接.",0
     msg_cancelwnet_1 db "此驱动器连接被关闭 .",0
     msg_cancelwnet_3 db "错误的连接脚本",0
     msg_cancelwnet_4 db "驱动器设备正在由一活动进程使用,不能断开连接",0
     msg_cancelwnet_5 db "不能打开连接脚本文件来处理持久连接",0
     msg_cancelwnet_6 db "其他错误",0
.data?
     dwResult dd ?
.code
;=====在调用此例程时hdc可换成返回成功或错误的参数指针
AsmCancelWNetConnection proc hwnd:DWORD,hdc:DWORD   ;hwnd是窗口句柄,hdc是DC句柄
     invoke WNetCancelConnection2,addr drvname,CONNECT_UPDATE_PROFILE,FALSE
     .IF EAX==NO_ERROR
        invoke TextOut,hdc,10,10,addr msg_cancelwnet_1,25
        MOV EAX,0    ;调用过程读返回码可知道是否成功
     .ELSE
        .IF EAX==ERROR_NOT_CONNECTED
           invoke TextOut,hdc,10,10,addr msg_cancelwnet_2,23
        .ELSEIF EAX==ERROR_BAD_PROFILE
           invoke TextOut,hdc,10,10,addr msg_cancelwnet_3,23
        .ELSEIF EAX==ERROR_DEVICE_IN_USE
           invoke TextOut,hdc,10,10,addr msg_cancelwnet_4,50
        .ELSEIF EAX==ERROR_CANNOT_OPEN_PROFILE
           invoke TextOut,hdc,10,10,addr msg_cancelwnet_5,46
        .ELSE
           invoke TextOut,hdc,10,10,addr msg_cancelwnet_6,14
        .ENDIF
        MOV EAX,1
     .ENDIF
     RET
AsmCancelWNetConnection endp