组合键的问题ALT+E

Question

我想模拟ALT+E打开程序的编辑菜单,然后模拟p键,实现这个快捷键的功能.ALT+E -> p[DllImport("User32.dll")]
public static extern long SendMessage(int hWnd,long wMsg,long wparam, long lparam);
const int WM_SYSCHAR    =                  0x0106;
const int WM_KEYDOWN    =                  0x0100;
        const int vbKeyP        =                  80 ;
const int vbKeyE        =                  69 ;SendMessage(TheApp.hWnd,WM_SYSCHAR,101, 0x20120001);
SendMessage(TheApp.hWnd,WM_KEYDOWN,vbKeyP, 0);
没有反应