如何让VB程序在后台接受键盘输入 给你说个简单好用的办法把'1添加一个Timer时间控件Private Declare Function GetAsyncKeyState Lib\"user32\"(ByVal vkey As Long)As Integer'申明apiPrivate Function MyHotKey(vKeyCode)As BooleanMyHotKey=((GetAsyncKeyState(vKeyCode)))End FunctionPrivate Sub Form_Load()Timer1.Interval=100 '定时检测Me.Visible=FalseEnd SubPrivate Sub Timer1_Timer()If MyHotKey(vbKeyO)Then Me.Visible=True'还可以换成调用其他函数End Sub
vb.net 获取键盘输入的字符 参考方法如下，具体解释已经注解在代码中；定义变量public delegate int HookProc(int nCode，Int32 wParam，IntPtr lParam)；static int hKeyboardHook=0；HookProc KeyboardHookProcedure；声明API函数安装钩子（using System.Runtime.InteropServices；[DllImport(\"user32.dll\"，CharSet=CharSet.Auto，CallingC.StdCall)]public static extern int SetWindowsHookEx(int idHook，HookProc lpfn，IntPtr hInstance，int threadId)；卸载钩子[DllImport(\"user32.dll\"，CharSet=CharSet.Auto，CallingC.StdCall)]public static extern bool UnhookWindowsHookEx(int idHook)；继续下一个钩子[DllImport(\"user32.dll\"，CharSet=CharSet.Auto，CallingC.StdCall)]public static extern int CallNextHookEx(int idHook，int nCode，Int32 wParam，IntPtr lParam)；取得当前线程编号（线程钩子需要用到）[DllImport(\"kernel32.dll\")]static extern int GetCurrentThreadId()；钩子子程：就是钩子所要做的事情private int KeyboardHookProc(int nCode，Int32 wParam，IntPtr lParam){if(nCode>；=0){线程键盘钩子判断是否按下键Keys keyData=(Keys)wParam；if(lParam.ToInt32()>；0){。
VB能区分键盘输入和扫描器输入吗？ 具体怎么做？ 现在常规的扫描码也是模拟键盘输入的，应该说不能区分.除非你选用串口的扫描器，这样自然就分开了.
