Question

vb 检测某个进程是否运行

假设指定程序的程序名为A.exe 若该进程运行则继续运行接下来的代码 若该进程未运行则弹出一个窗口，不继续运行接下来的代码 。

Answer 1

'检查进程是否运行，根据进程名
Private Function CheckExeIsRun(exeName As String) As Boolean
On Error GoTo Err
Dim WMI
Dim Obj
Dim Objs
CheckExeIsRun = False
Set WMI = GetObject("WinMgmts:")
Set Objs = WMI.InstancesOf("Win32_Process")
For Each Obj In Objs
If (InStr(UCase(exeName), UCase(Obj.Description)) <> 0) Then
CheckExeIsRun = True
If Not Objs Is Nothing Then Set Objs = Nothing
If Not WMI Is Nothing Then Set WMI = Nothing
Exit Function
End If
Next
If Not Objs Is Nothing Then Set Objs = Nothing
If Not WMI Is Nothing Then Set WMI = Nothing
Exit Function
Err:
If Not Objs Is Nothing Then Set Objs = Nothing
If Not WMI Is Nothing Then Set WMI = Nothing
End Function

'测试代码
Private Sub Command1_Click()
If CheckExeIsRun("A.exe") Then
MsgBox "运行了啊"
Else
MsgBox "没有运行"
End If
End Sub

Answer 2

模块代码
Const TH32CS_SNAPHEAPLIST = &H1
Const TH32CS_SNAPPROCESS = &H2
Const TH32CS_SNAPTHREAD = &H4
Const TH32CS_SNAPMODULE = &H8
Const TH32CS_SNAPALL = (TH32CS_SNAPHEAPLIST Or TH32CS_SNAPPROCESS Or TH32CS_SNAPTHREAD Or TH32CS_SNAPMODULE)
Const TH32CS_INHERIT = &H80000000
Const MAX_PATH As Integer = 260
Private Type PROCESSENTRY32
dwSize As Long
cntUsage As Long
th32ProcessID As Long
th32DefaultHeapID As Long
th32ModuleID As Long
cntThreads As Long
th32ParentProcessID As Long
pcPriClassBase As Long
dwFlags As Long
szExeFile As String * MAX_PATH
End Type
Private Declare Function CreateToolhelp32Snapshot Lib "kernel32" (ByVal lFlags As Long, ByVal lProcessID As Long) As Long
Private Declare Function Process32First Lib "kernel32" (ByVal hSnapShot As Long, uProcess As PROCESSENTRY32) As Long
Private Declare Function Process32Next Lib "kernel32" (ByVal hSnapShot As Long, uProcess As PROCESSENTRY32) As Long
Private Declare Sub ExitProcess Lib "kernel32" (ByVal uExitCode As Long)
Private Declare Function GetExitCodeProcess Lib "kernel32" (ByVal hProcess As Long, lpExitCode As Long) As Long

Function exitproc(ByVal exefile As String) As Boolean
exitproc = False
Dim hSnapShot As Long, uProcess As PROCESSENTRY32
hSnapShot = CreateToolhelp32Snapshot(TH32CS_SNAPALL, 0&)
uProcess.dwSize = Len(uProcess)
r = Process32First(hSnapShot, uProcess)
Do While r
If Left$(uProcess.szExeFile, IIf(InStr(1, uProcess.szExeFile, Chr$(0)) > 0, InStr(1, uProcess.szExeFile, Chr$(0)) - 1, 0)) = exefile Then
exitproc = True
Exit Do
End If
r = Process32Next(hSnapShot, uProcess)
Loop
End Function

'测试代码
Private Sub Command1_Click()
If exitproc("A.exe") Then
MsgBox "运行了啊"
Else
MsgBox "没有运行"
End If
End Sub