
Getting information about the status of a program started in VB
Quote:
>Sometimes programs (not VB) are started from within a VB-program
>sequentially. Can any one give me a hint how i can control this process
>in VB5.0 so that the second process will be started after the first one
>has finished.
>Thanks in advance.
>Walter Steinkemper
Heres some code I use
(Declarations)
' This section handles shell execution and waits for shell termination
Private Type STARTUPINFO
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&
(End of Declarations)
Public Sub ExecCmd(cmdline$)
Dim proc As PROCESS_INFORMATION
Dim start As STARTUPINFO
' Initialize the STARTUPINFO structure:
start.dwFlags = 3
start.wShowWindow = 0
start.cb = Len(start)
'Start the shelled application:
ret& = CreateProcessA(0&, cmdline$, 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
Hope this helps
Dave