Send Ctrl + To Window

Question

I am trying to send messages to a window that says Ctrl and up arrow. I have the basics, I can send the press with a space, which is recorded in order. But I can’t make it work . ctrl+ ↑selected code fragments:

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]
static extern IntPtr SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);

Now this is great for sending Space:

public static void SendKeyPress(IntPtr handle, VKeys key)
{
    SendMessage(handle, (int) WMessages.WM_KEYDOWN, (int) key, 0);
    SendMessage(handle, (int)WMessages.WM_KEYUP, (int)key, 0);
}

But this does not work for sending ctrl+ ↑to VLC to increase the sound volume:

public static void SendKeyPress(IntPtr handle, VKeys key, bool control)
{
    int lParamKeyDown = 0;
    lParamKeyDown |= 1;
    lParamKeyDown |= 1 << 24;

    int lParamKeyUp = lParamKeyDown;
    lParamKeyUp |= 1 << 30;
    lParamKeyUp |= 1 << 31; //it was down before

    int lParamCtrlDown = lParamKeyDown;
    int lParamCtrlUp = lParamKeyUp;

    lParamKeyDown |= (int)MapVirtualKey((uint)key, 0) << 16;
    lParamKeyUp |= (int)MapVirtualKey((uint)key, 0) << 16;
    lParamCtrlDown |= (int)MapVirtualKey((uint)VKeys.VK_CONTROL, 0) << 16;
    lParamCtrlUp |= (int)MapVirtualKey((uint)VKeys.VK_CONTROL, 0) << 16;

    IntPtr controlPtr = new IntPtr((int)VKeys.VK_CONTROL);
    IntPtr lParamCtrlDownPtr = new IntPtr(lParamCtrlDown);
    IntPtr lParamCtrlUpPtr = new IntPtr(lParamCtrlUp);
    IntPtr lParamKeyDownPtr = new IntPtr(lParamKeyDown);
    IntPtr lParamKeyUpPtr = new IntPtr(lParamKeyUp);
    IntPtr keyPtr = new IntPtr((int)key);
    object o = new object();
    HandleRef wndRef = new HandleRef(o, handle);
    PostMessage(wndRef, (uint)WMessages.WM_KEYDOWN, controlPtr, lParamCtrlDownPtr);
    PostMessage(wndRef, (uint) WMessages.WM_KEYDOWN, keyPtr, lParamKeyDownPtr);

    PostMessage(wndRef, (uint) WMessages.WM_KEYUP, controlPtr, lParamCtrlUpPtr);
    PostMessage(wndRef, (uint) WMessages.WM_KEYUP, keyPtr, lParamKeyUpPtr);
 }

What am I missing?

Edit3: The messages are the same and there are no additional messages since I switched to PostMessage, but the VLC will still not increase or decrease the volume.

This is not just VLC, Spotify will not accept the same command, even though messagess looks exactly the same in Spy ++.

Answer 1

, , :

SendMessage(handle, (int) WMessages.WM_KEYDOWN, (int) key, 0);
SendMessage(handle, (int) WMessages.WM_KEYDOWN, (int)VKeys.VK_CONTROL, 0);

:

SendMessage(handle, (int) WMessages.WM_KEYDOWN, (int)VKeys.VK_CONTROL, 0);
SendMessage(handle, (int) WMessages.WM_KEYDOWN, (int) key, 0);

?

Answer 2

Ctrl + Right () . hEdit , .

AttachThreadInput(GetCurrentThreadID, GetWindowThreadProcessId(hEdit, 0), true);
hEdit := SetFocus(hEdit);

keybd_event(VK_CONTROL, 0, 0, 0);
keybd_event(VK_RIGHT, 0, 0, 0);
keybd_event(VK_RIGHT, 0, KEYEVENTF_KEYUP, 0);
keybd_event(VK_CONTROL, 0, KEYEVENTF_KEYUP, 0);

SetFocus(hEdit); // restore focus
AttachThreadInput(GetCurrentThreadID, GetWindowThreadProcessId(hEdit, 0), false); // "Disconnect"

, . , , , :

var
  s: TKeyboardState;
  PrevState: byte;

AttachThreadInput(GetCurrentThreadID, GetWindowThreadProcessId(hEdit, 0), true);

GetKeyboardState(s);
PrevState := s[VK_CONTROL];
s[VK_CONTROL] := 128;
SetKeyboardState(s);
SendMessage(hEdit, WM_KEYDOWN, VK_RIGHT, 0);
s[VK_CONTROL] := PrevState;
SetKeyboardState(s);

AttachThreadInput(GetCurrentThreadID, GetWindowThreadProcessId(hEdit, 0), false);

Answer 3

. SetKeyboardState , . Delphi Ctrl + Right Memo.

var
  s: TKeyboardState;
  PrevState: byte;
begin
  GetKeyboardState(s);
  PrevState := s[VK_CONTROL];
  s[VK_CONTROL] := 128;
  SetKeyboardState(s);
  SendMessage(Memo1.Handle, WM_KEYDOWN, VK_RIGHT, 0);
  s[VK_CONTROL] := PrevState;
  SetKeyboardState(s)
end;