求冻结键盘的代码!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Question

  就是在系统中按什么键都失效！  求冻结代码和解除冻结的代码   感激万分！！！！！！！！！！

Answer 1

//锁住
SystemParametersInfo(SPI_SCREENSAVERRUNNING, 1, @Temp, 0);
      asm    //封锁20端口 锁定键盘 98&95
        IN AL,21H
        OR AL,02H
        OUT 21H,AL
      end;
//解锁
SystemParametersInfo(SPI_SCREENSAVERRUNNING, 0, @Temp, 0);
      asm    //解锁20端口 解锁键盘
        IN AL,21H
        AND AL,0FDH
        OUT 21H,AL
      end;