自定义函数fIsAppRunning来判断指定的程序是否运行。函数的第一个参数为程序名称，第二个参为可选参数，如果你想判断的存在同时激活程序窗口则设成TRUE，反之FALSE。例如：我想想判断WORD程序是否运行，如运行我们激活WORD窗口，可以在调试窗体中输入：?fIsAppRunning("Word",True)回车，如果只是想知道WORD是否运行，则输入?fIsAppRunning("word")后回车

'***************** Code Start ***************
'This code was originally written by Dev Ashish.
'It is not to be altered or distributed,
'except as part of an application.
'You are free to use it in any application,
'provided the copyright notice is left unchanged.
'
'Code Courtesy of
'Dev Ashish
'
Private Const SW_HIDE = 0
Private Const SW_SHOWNORMAL = 1
Private Const SW_NORMAL = 1
Private Const SW_SHOWMINIMIZED = 2
Private Const SW_SHOWMAXIMIZED = 3
Private Const SW_MAXIMIZE = 3
Private Const SW_SHOWNOACTIVATE = 4
Private Const SW_SHOW = 5
Private Const SW_MINIMIZE = 6
Private Const SW_SHOWMINNOACTIVE = 7
Private Const SW_SHOWNA = 8
Private Const SW_RESTORE = 9
Private Const SW_SHOWDEFAULT = 10
Private Const SW_MAX = 10

Private Declare Function apiFindWindow Lib "user32" Alias _
"FindWindowA" (ByVal strClass As String, _
ByVal lpWindow As String) As Long

Private Declare Function apiSendMessage Lib "user32" Alias _
"SendMessageA" (ByVal Hwnd As Long, ByVal Msg As Long, ByVal _
wParam As Long, lParam As Long) As Long

Private Declare Function apiSetForegroundWindow Lib "user32" Alias _
"SetForegroundWindow" (ByVal Hwnd As Long) As Long

Private Declare Function apiShowWindow Lib "user32" Alias _
"ShowWindow" (ByVal Hwnd As Long, ByVal nCmdShow As Long) As Long

Private Declare Function apiIsIconic Lib "user32" Alias _
"IsIconic" (ByVal Hwnd As Long) As Long

Function fIsAppRunning(ByVal strAppName As String, _
Optional fActivate As Boolean) As Boolean
Dim lngH As Long, strClassName As String
Dim lngX As Long, lngTmp As Long
Const WM_USER = 1024
On Local Error GoTo fIsAppRunning_Err
fIsAppRunning = False
Select Case LCase$(strAppName)
Case "excel": strClassName = "XLMain"
Case "word": strClassName = "OpusApp"
Case "access": strClassName = "OMain"
Case "powerpoint95": strClassName = "PP7FrameClass"
Case "powerpoint97": strClassName = "PP97FrameClass"
Case "notepad": strClassName = "NOTEPAD"
Case "paintbrush": strClassName = "pbParent"
Case "wordpad": strClassName = "WordPadClass"
Case Else: strClassName = vbNullString
End Select

If strClassName = "" Then
lngH = apiFindWindow(vbNullString, strAppName)
Else
lngH = apiFindWindow(strClassName, vbNullString)
End If
If lngH <> 0 Then
apiSendMessage lngH, WM_USER + 18, 0, 0
lngX = apiIsIconic(lngH)
If lngX <> 0 Then
lngTmp = apiShowWindow(lngH, SW_SHOWNORMAL)
End If
If fActivate Then
lngTmp = apiSetForegroundWindow(lngH)
End If
fIsAppRunning = True
End If
fIsAppRunning_Exit:
Exit Function
fIsAppRunning_Err:
fIsAppRunning = False
Resume fIsAppRunning_Exit
End Function
'******************** Code End ****************

特别说明:本文原创作者:Dev Ashish