我必须读2D条码,该条码以基数256编码, 当我扫描条码时, 它会发送来自键盘的不同字符, 它会改变焦点, 将视觉工作室转换为全屏, 命令从注意++ 发送到打印机 。
我想它读的是 ALT + TAB, CTRL + P, ALT + SHIFT 等, 我无法捕捉条码中的所有字节 。
我试图用 e. handled = True 和 e.keyChar 的方法在文本框 KeyPress 方法上捕捉事件, 并在字节中添加 e. holdled = True and e.keyChar ()
窗体上. 装入我设定 :
Me.KeyPreview = True
还在表格上试过 钥匙没走运
Can anyone help me on this issue? Thank you for your time.
为了做到这一点,我不得不将条形码阅读器的界面改为 R232, 并模仿 com 端口 。
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