仅供参考，因为已经在评论中回答了，您必须使用 SendInput 而不是 SendMessage，在填充 SendInput 函数所需的 INPUT 结构时，请确保将 Flags 与 KEYEVENTF_SCANCODE 结合起来发送硬件信号而不是虚拟信号.这些将由 DirectInput 处理.来源:在 DirectInput 应用程序中使用 SendInput API 模拟键盘一个>

For reference sake, as it has already been answered in the comments, you have to use SendInput rather than SendMessage, when filling the INPUT structure required for the SendInput function make sure you combine your Flags with KEYEVENTF_SCANCODE to send hardware signals instead of virtual ones. These will be handled by DirectInput. Source : Simulating Keyboard with SendInput API in DirectInput applications