Created
January 18, 2014 16:21
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Supporting code for http://www.xaprb.com/blog/2005/10/14/how-to-create-a-vb6-console-program/
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Attribute VB_Name = "ModStdIO" | |
Option Explicit | |
Private Declare Function GetStdHandle Lib "kernel32" (ByVal nStdHandle As Long) As Long | |
Private Declare Function ReadFile Lib "kernel32" (ByVal hFile As Long, _ | |
lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, _ | |
lpNumberOfBytesRead As Long, lpOverlapped As Any) As Long | |
Private Declare Function WriteFile Lib "kernel32" (ByVal hFile As Long, _ | |
lpBuffer As Any, ByVal nNumberOfBytesToWrite As Long, _ | |
lpNumberOfBytesWritten As Long, lpOverlapped As Any) As Long | |
Private Const STD_OUTPUT_HANDLE = -11& | |
Private Const STD_INPUT_HANDLE = -10& | |
Function ReadStdIn(Optional ByVal NumBytes As Long = -1) As String | |
Dim StdIn As Long | |
Dim Result As Long | |
Dim Buffer As String | |
Dim BytesRead As Long | |
StdIn = GetStdHandle(STD_INPUT_HANDLE) | |
Buffer = Space$(1024) | |
Do | |
Result = ReadFile(StdIn, ByVal Buffer, Len(Buffer), BytesRead, ByVal 0&) | |
If Result = 0 Then | |
Err.Raise 1001, , "Unable to read from standard input" | |
End If | |
ReadStdIn = ReadStdIn & Left$(Buffer, BytesRead) | |
Loop Until BytesRead < Len(Buffer) | |
End Function | |
Sub WriteStdOut(ByVal Text As String) | |
Dim StdOut As Long | |
Dim Result As Long | |
Dim BytesWritten As Long | |
StdOut = GetStdHandle(STD_OUTPUT_HANDLE) | |
Result = WriteFile(StdOut, ByVal Text, Len(Text), BytesWritten, ByVal 0&) | |
If Result = 0 Then | |
Err.Raise 1001, , "Unable to write to standard output" | |
ElseIf BytesWritten < Len(Text) Then | |
Err.Raise 1002, , "Incomplete write operation" | |
End If | |
End Sub |
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