WaitShell Prog

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&
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

'Add the following code the Form_Click() event procedure of Form1:
Sub Form_Click ()
    ExecCmd "notepad.exe"
    MsgBox "Process Finished"
End Sub

'Press the F5 key to run the application.
'Using the mouse, click the Form1 window. At this point the Notepad
'application is shelled.
'NOTE: The MsgBox statement following the ExecCmd() subroutine is not
'executed because the WaitForSingleObject() function prevents it.
'The message box does not appear until Notepad is closed when the user
'chooses Exit from Notepad's File menu (ALT, F, X).

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&
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

'Add the following code the Form_Click() event procedure of Form1:

Sub Form_Click ()
ExecCmd "notepad.exe"
MsgBox "Process Finished"
End Sub

'Press the F5 key to run the application.

'Using the mouse, click the Form1 window. At this point the Notepad

'application is shelled.

'NOTE: The MsgBox statement following the ExecCmd() subroutine is not

'executed because the WaitForSingleObject() function prevents it.

'The message box does not appear until Notepad is closed when the user

'chooses Exit from Notepad's File menu (ALT, F, X).