PostMessage Key Constants

I am sending messages to other windows using the PostMessage API. For example, I open calc and send it the Ctrl+V message (which is the hotkey for paste). That works OK. The problem comes when I want to send and Alt+something command. I don't know the constants for alt, and they are not in the KeyCodeConstants enum. Please help.

Here is what I have now:

VB Code:

Private Sub Command2_Click()
    Dim winhwnd As Long
    winhwnd = FindWindow(vbNullString, "calculator")
 
    PostMessage winhwnd, WM_KEYDOWN, vbKeyControl, 0
    
    PostMessage winhwnd, WM_KEYDOWN, vbKeyV, 0
    PostMessage winhwnd, WM_KEYUP, vbKeyV, 0
   
    PostMessage winhwnd, WM_KEYUP, vbKeyControl, 0
 
End Sub

Const VK_MENU = &H12 'ALT Button
Const VK_LMENU = &HA4 'Specifically Left Alt button

Hope this helps

I can't get it to work. I am trying to send menu commands to the calc. It just presses the "E" button on the calculator (in

VB Code:

Private Sub Command2_Click()
    Dim winhwnd As Long
    winhwnd = FindWindow(vbNullString, "calculator")
 
    PostMessage winhwnd, WM_KEYDOWN, vbKeyMenu, 0
    
    PostMessage winhwnd, WM_KEYDOWN, vbKeyE, 0
    PostMessage winhwnd, WM_KEYUP, vbKeyE, 0
   
    PostMessage winhwnd, WM_KEYUP, vbKeyMenu, 0
 
End Sub

The control button works (like in the first post)

Help Help Help!!!!