[RESOLVED] get size of a window?

[Justa Lol]

how can i get the height and width of a window in an external application?

[jmcilhinney]

You can call the GetWindowRect API function. You can then calculate the dimensions from the RECT structure it populates. You need the handle of the Window to pass to that function, so you'd use the FindWindow API. You'll defeinitely find plenty of examples of that one around, but maybe fewer for GetWindowRect. It's fairly simply though so, if you know how to call Windows API functions, it's not hard to work put for yourself.

[Justa Lol]

alrighty, thanks, i'll do some research then post back.

[Justa Lol]

i figured it out.

    Declare Function GetWindowRect Lib "user32" (ByVal hwnd As Integer, ByRef lpRect As RECT) As Integer
    Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr

    Structure RECT
        Public Left As Integer
        Public Top As Integer
        Public Right As Integer
        Public Bottom As Integer
    End Structure

    Sub getResolution()
        Dim nWnd As IntPtr
        Dim ceroIntPtr As New IntPtr(0)
        Dim Wnd_name As String

        Wnd_name = "Untitled - Notepad"
        nWnd = FindWindow(Nothing, Wnd_name)
        Dim hwnd As Integer = nWnd
        Dim rectWindow As New RECT

        If GetWindowRect(hwnd, rectWindow) = 0 Then
            Label6.Text = "Could not find hWnd"
        Else
            Label6.Text = rectWindow.Right - rectWindow.Left & "x" & rectWindow.Bottom - rectWindow.Top
            resTop = rectWindow.Top
            resLeft = rectWindow.Left
            resBottom = rectWindow.Bottom
            resRight = rectWindow.Right

        End If
    End Sub