[转帖]执行外部程序直到程序关闭
32-Bit App Can Determine When a Shelled Process Ends<H3>Step-by-Step Example</H3>
<OL>
<LI><FONT size=2>Start a new project in Visual Basic. Form1 is created by default. </FONT>
<LI><FONT size=2>Add the following code to the general declarations section of Form1: </FONT>
<PRE><FONT size=2> Private Type STARTUPINFO
</FONT><PRE></PRE><FONT size=2> cb As Long
lpReserved As String
lpDesktop As String
lpTitle As String
dwX As Long
dwY As Long
dwXSize As Long
dwYSize As Long
dwXCountChars As Long
dwYCountChars As Long
dwFillAttribute As Long
dwFlags As Long
wShowWindow As Integer
cbReserved2 As Integer
lpReserved2 As Long
hStdInput As Long
hStdOutput As Long
hStdError As Long
End Type
Private Type PROCESS_INFORMATION
hProcess As Long
hThread As Long
dwProcessID As Long
dwThreadID As Long
End Type
Private Declare Function WaitForSingleObject Lib "kernel32" (ByVal _
hHandle As Long, ByVal dwMilliseconds As Long) As Long
Private Declare Function CreateProcessA Lib "kernel32" (ByVal _
lpApplicationName As Long, ByVal lpCommandLine As String, ByVal _
lpProcessAttributes As Long, ByVal lpThreadAttributes As Long, _
ByVal bInheritHandles As Long, ByVal dwCreationFlags As Long, _
ByVal lpEnvironment As Long, ByVal lpCurrentDirectory As Long, _
lpStartupInfo As STARTUPINFO, lpProcessInformation As _
PROCESS_INFORMATION) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal _
hObject As Long) As Long
Private Const NORMAL_PRIORITY_CLASS = &H20&
Private Const INFINITE = -1&
Public Sub ExecCmd(cmdline$)
Dim proc As PROCESS_INFORMATION
Dim start As STARTUPINFO
' Initialize the STARTUPINFO structure:
start.cb = Len(start)
' Start the shelled application:
ret& = CreateProcessA(0&, cmdline$, 0&, 0&, 1&, _
NORMAL_PRIORITY_CLASS, 0&, 0&, start, proc)
' Wait for the shelled application to finish:
ret& = WaitForSingleObject(proc.hProcess, INFINITE)
ret& = CloseHandle(proc.hProcess)
End Sub
</FONT></PRE>
<LI><FONT size=2>Add the following code the Form_Click() event procedure of Form1: </FONT>
<PRE><FONT size=2> Sub Form_Click ()
ExecCmd "notepad.exe"
MsgBox "Process Finished"
End Sub
</FONT></PRE>
<LI><FONT size=2>Press the F5 key to run the application. </FONT>
<LI><FONT size=2>Using the mouse, click the Form1 window. At this point the Notepad application is shelled. </FONT></LI></OL>
页:
[1]