static void SendKey()
{
var bar = WinApi.FindWindow(null, "Form1Text");
var btnBar = WinApi.FindWindowEx(bar, IntPtr.Zero, null, "button1");
var txtBar = WinApi.FindWindowEx(bar, btnBar, null, null);
//WinApi.SendKey(txtBar, KeySnap.VK_CAPITAL);
//Thread.Sleep(500);
WinApi.SendKey(txtBar, KeySnap.VK_A);
Thread.Sleep(1000);
WinApi.SendKey(txtBar, KeySnap.VK_B);
Thread.Sleep(1000);
WinApi.SendKey(txtBar, KeySnap.VK_C);
}