Option Explicit
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Sub SetWindowPos Lib "user32" (ByVal hWnd As Long, ByVal hWndInsertAfter As Long, ByVal X As Long, ByVal Y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long)
Private Sub Resize_Chrome()
Dim ChromeHandle As Long
ChromeHandle = FindWindow(vbNullString, "New Tab - Google Chrome")
SetWindowPos ChromeHandle, -1, 0, 0, 600, 600, &H10
End Sub
https://msdn.microsoft.com/en-us/library/windows/desktop/ms633545%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396