module1.bas

如何在VB中调用I/O口的例子 查找指定的应用程序并将焦点定位到该应用程

Attribute VB_Name = "Module1"
Option Explicit

'// Window attribute functions
Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long) As Long
Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long

'// Z-order and placement APIs
Declare Function SetParent Lib "user32" (ByVal hWndChild As Long, ByVal hWndNewParent As Long) As Long
Declare Function 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) As Long

'// Focus and activation functions
Declare Function winSetFocus Lib "user32" Alias "SetFocus" (ByVal hWnd As Long) As Long
Declare Function winGetFocus Lib "user32" Alias "GetFocus" () As Long

Public Const GWL_STYLE = (-16)
Public Const WS_CHILD = &H40000000

' SetWindowPos Flags
Public Const SWP_NOSIZE = &H1
Public Const SWP_NOMOVE = &H2
Public Const SWP_NOZORDER = &H4
Public Const SWP_NOREDRAW = &H8
Public Const SWP_NOACTIVATE = &H10
Public Const SWP_FRAMECHANGED = &H20
Public Const SWP_SHOWWINDOW = &H40
Public Const SWP_HIDEWINDOW = &H80
Public Const SWP_NOCOPYBITS = &H100
Public Const SWP_NOOWNERZORDER = &H200

Public Const SWP_DRAWFRAME = SWP_FRAMECHANGED
Public Const SWP_NOREPOSITION = SWP_NOOWNERZORDER

' SetWindowPos() hwndInsertAfter values
Public Const HWND_TOP = 0
Public Const HWND_BOTTOM = 1
Public Const HWND_TOPMOST = -1
Public Const HWND_NOTOPMOST = -2