| ＶＢのShell関数は戻り値としてプロセスID（タスクID）をかえします。しかしAPI関数等を使う場合プロセスハンドルが必要となる場合があります。そこでプロセスハンドルをかえすShell関数、ShellExを作ろうと思います。 まずＷｉｎ３２ＡＰＩ関数の定義をします。
Private Const STARTF_USESHOWWINDOW = &H1
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 CreateProcess Lib
"kernel32" Alias
"CreateProcessA" _
(ByVal lpApplicationName As String, _
ByVal lpCommandLine As String, _
ByVal lpProcessAttributes As Long, _
ByVal lpThreadAttributes As Long, _
ByVal bInheritHandles As Long, _
ByVal dwCreationFlags As Long, _
lpEnvironment As Any, _
ByVal lpCurrentDriectory As String, _
lpStartupInfo As STARTUPINFO, _
lpProcessInformation As
PROCESS_INFORMATION) As Long |
つぎにShellEx関数を作ります。
Public Function ShellEx(FileName As String ,
optional Style As Long = vbMinimizedFocus) As
Long
Dim SI As STARTUPINFO
Dim PI As PROCESS_INFORMATION
Dim lngRC As Long
With SI
.cb = Len(SI)
.dwFlags = STARTF_USESHOWWINDOW
.wShowWindow = Style
End With
lngRC = CreateProcess(vbNullString,
FileName & vbNullString, 0, 0, False, 0, 0,
vbNullString, SI, PI)
If lngRC <> 0 Then ShellEx =
PI.hProcess
End Function
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使い方はShell関数と同様です。
使用例
Dim lngHandle as Long
lngHandle=ShellEx("Notepad.exe" ,
vbNormalFocus)
MsgBox "プロセスハンドルは"
& lngHandle & "です" |
|