c# - 在 C#/.NET 中将密钥发送到非活动应用程序

Question

我有一个带有组合框的应用程序，其中包含当前正在运行的应用程序的名称。正如我从 msdn 库中了解到的，SendKeys 方法只能将密钥发送到活动应用程序。在.NET中是否有可能将密钥也发送到非活动应用程序？或者至少在 WinAPI 中？

Answer 1

您可以使用SendMessage()API 函数将击键发送到非活动窗口。

Answer 2

With C# <3 is everthing possible :D

No need to be active window, as u wished.

Also here a usefull list of Virtual Key Codes

        [DllImport("user32.dll")]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll")]
        public static extern bool PostMessage(int hWnd, uint Msg, int wParam, int lParam);

        private void button1_Click(object sender, EventArgs e)
        {
            const int WM_SYSKEYDOWN = 0x0104;
            const int VK_KEY_A = 0x41;

            IntPtr WindowToFind = FindWindow(null, "Window Name");

          //In ur case u have to write a code that translates the combobox into Virtual Key Codes. Will take time but it shouls be easy

            PostMessage(WindowToFind, WM_SYSKEYDOWN, VK_KEY_A, 0);
          //PostMessage(WindowToFind, WM_SYSKEYDOWN, ((int)Keys.NumPad7), 0);
        }