如何编写本地化的屏幕键盘
我必须为我们公司的程序编写一个屏幕键盘，该程序主要用于具有触摸功能的工业PC。
我们无法使用Windows默认键盘，因为我们不需要键盘上的所有键。所以我被要求用C＃写一个自定义的。
我已经发现这个博客作为参考，但我不知道如何开始。
我创建了一个小型原型GUI，为每个键分配一个扫描码，并将这些扫描码转换为相关的字符。并将它们发送到主动控件。但我不确定我应该使用哪种扫描码。
所以我的问题是，这是编写像这样的OSK的正确方法，如果是，我应该使用哪些扫描码？有链接吗？
我也不确定如何处理换档状态......
编辑：
好的，我做了一些研究，想出了一个osk，它读取当前的键盘布局，甚至可以处理简单的移位状态（Shift和Alt Gr）。我写了一个继承自
Button
KeyButton
KeyButton
ScanCode
KeyButton
没有找到相关结果
已邀请:
3 个回复
蕾跨立锌煤
SendKeys.Send("A");外镶受继
public class KeyMapper { /// <summary> /// Map key code to character. /// If key code cannot be mapped returns empty char. /// </summary> public static char MapKey(Key key, bool shiftPressed, string culture) { CheckCulture(culture); int englishVirtuaCode = KeyInterop.VirtualKeyFromKey(key); return EnglishVirtualCodeToChar(englishVirtuaCode, shiftPressed, culture); } private static void CheckCulture(string culture) { InputLanguage language = InputLanguage.FromCulture(new CultureInfo(culture)); if (language == null) throw new ArgumentException(string.Format("culture {0} does not exist.", culture)); } private static char EnglishVirtualCodeToChar(int enlishVirtualCode, bool shiftPressed, string culture) { var scanCode = KeyMappingWinApi.MapVirtualKeyEx((uint)enlishVirtualCode, 0, EnglishCultureHandle); var vitualKeyCode = KeyMappingWinApi.MapVirtualKeyEx(scanCode, 1, GetCultureHandle(culture)); byte[] keyStates = GetKeyStates(vitualKeyCode, shiftPressed); const int keyInformationSize = 5; var stringBuilder = new StringBuilder(keyInformationSize); KeyMappingWinApi.ToUnicodeEx(vitualKeyCode, scanCode, keyStates, stringBuilder, stringBuilder.Capacity, 0, GetCultureHandle(culture)); if (stringBuilder.Length == 0) return ' '; return stringBuilder[0]; } private static IntPtr EnglishCultureHandle { get { return GetCultureHandle("en-US"); } } private static IntPtr GetCultureHandle(string culture) { return InputLanguage.FromCulture(new CultureInfo(culture)).Handle; } /// <summary> /// Gets key states for ToUnicodeEx function /// </summary> private static byte[] GetKeyStates(uint keyCode, bool shiftPressed) { const byte keyPressFlag = 0x80; const byte shifPosition = 16; // position of Shift key in keys array var keyStatses = new byte[256]; keyStatses[keyCode] = keyPressFlag; keyStatses[shifPosition] = shiftPressed ? keyPressFlag : (byte)0; return keyStatses; } } public class KeyMappingWinApi { [DllImport("user32.dll")] public static extern uint MapVirtualKeyEx(uint uCode, uint uMapType, IntPtr dwhkl); [DllImport("user32.dll")] public static extern int ToUnicodeEx(uint wVirtKey, uint wScanCode, byte[] lpKeyState, [Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pwszBuff, int cchBuff, uint wFlags, IntPtr dwhkl); [DllImport("user32.dll")] public static extern short VkKeyScanEx(char ch, IntPtr dwhkl); }樊熄忙暖