Shelled Process with NO Window Display Using This Code
'Question: I need this to run with out any window activity.
'Just want to get back the error codes that a program
'returns when completed.
'Just paste this into a form and change the
'ExecCmd("\norman\win95\nvcpre.exe a: /Q") to anything
'that needs no user input and will return error codes to 'read.
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 Declare Function GetExitCodeProcess Lib "kernel32" _
(ByVal hProcess As Long, lpExitCode As Long) As Long
Private Const NORMAL_PRIORITY_CLASS = &H20&
Private Const INFINITE = -1&
Public Function 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)
Call GetExitCodeProcess(proc.hProcess, Ret&)
Call CloseHandle(proc.hProcess)
ExecCmd = Ret&
End Function
Sub Form_Load()
Dim retval As Long
'Run Virus Application NO USER INPUT OR INTERACTION
'DOS Error Code Return 0 = NO VIRUS 1 = VIRUS
'Use any program that returns a error code
retval = ExecCmd("\norman\win95\nvcpre.exe a: /Q")
MsgBox "Process Finished, Exit Code " & retval
End Sub
Set the nvcpre.exe program properties to "Run Minimized" and "Close on Exit"...
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BuzzLightYearAuthor Commented:
Tried that been there NO GO
When Example nvcpre is run in a DOS window at the command prompt there is no screen activity. You will just get back the prompt.
Example:
C:\>nvcpre <Enter>
C:\>
You would have to call nvcpre from a batch file to get the error codes and create echo calls for screen activity.
My Need is to Make sure that the application I call from VB5 controls the screen not the application.
With this code it's not the application that is controlling the window but how STARTUPINFO is setup, I think because if I knew I won't be asking the question.
Good Try Mark
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I thought you wanted the DOS child to run invisibly when fired from windows...
Then you say "Make sure that the application I call from VB5 controls the screen not the
application.". I'm *CONFUSED*. If you *WANT* the child app to be visible set the properties to "RUN MAXIMIZED".
Running your program in a DOS window is *NOT* a fair test of how it will run when it is spawned as a child from VB5.
Please clarify...
M
0
BuzzLightYearAuthor Commented:
dabellei
You read my question and understood the answer. Thank You
I had all ready seen the answer from you when you tried to answer someone else. about batch files.
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