How do you calculate the height of the title bar in VB6? - vb6

Question

I'm trying to display one form relative to a Button on a control below it.
But Button.top is relative to the titlebar of the bottom form, and the top form will be relative to the screen.
So, to compensate for that I need to now how tall the titlebar is.
I've used Form.height-Form.ScalehHeight but ScaleHeight doesn't include the title bar or the border so Scaleheight is inflated slightly.
Anyone know how to calculate the height of just the title bar?

Answer 1

You need to use the GetSystemMetrics API call to get the height of the titlebar.
Private Declare Function GetSystemMetrics Lib "user32" (ByVal nIndex As Long) As Long
Private Const SM_CYCAPTION = 4
Property Get TitleBarHeight() as Long
TitleBarHeight = GetSystemMetrics(SM_CYCAPTION)
End Property
Note: This will return the height in pixels. If you need twips you will have to convert using a form's ScaleY method like so: Me.ScaleY(TitleBarHeight(), vbPixels, vbTwips)

Answer 2

Subtract it back out:
(Form.height-Form.ScaleHeight) - (Form.Width-Form.ScaleWidth) / 2

Answer 3

"Recursive's" answer above is not quite correct. It subtracts twice the border width - there is a border on the left and one on the right!
We get the best results with this:
(Form.Height-Form.ScaleHeight) - (Form.Width-Form.ScaleWidth)/2

Answer 4

' For completeness:
Public Const SM_CYCAPTION = 4
Public Const SM_CYBORDER = 6
Public Const SM_CYFRAME = 33
' in Pixels
Property Get NonClinetHeight()
FrameH = GetSystemMetrics(SM_CYFRAME) ' Total height, Top + Bottom
CaptionH = GetSystemMetrics(SM_CYCAPTION)
BorderH = GetSystemMetrics(SM_CYBORDER) ' Border around Client area
NonClinetHeight = FrameH + CaptionH + (BorderH * 2)
End Property

Answer 5

You'll probably need to make a Win32 API call to GetSystemMetrics()

Answer 6

You can use the ClientToScreen() windows API function to convert a point from client coordinates to screen coordinates:
Dim Position As Point
Position.x = 0
Position.y = 0
ClientToScreen Me.hWnd, Position
FormTop = Position.y
If you want to skip this and go direct to the button, you can use the button's position (in pixels):
Position.x = This.ScaleX(Button.Left, this.ScaleMode, vbPixels)
Position.Y = This.ScaleY(Button.Top, this.ScaleMode, vbPixels)
...
Or just get the buttons position using GetWindowRect()
Dim Position2 As Rect
GetClientRect Button.hWnd, Position2
Position.x = Position2.left
Position.y = Position2.top
...