如何在VB6中写入调试控制台？

Question

我是VB的新手.我想测试一些旧的VB代码,但我需要能够打印到控制台才能测试代码中设置的某些值.如何从VB打印到控制台？

Answer 1

使用debug.print.但是VB6应用程序上没有控制台,它将打印到调试窗口.

Answer 2

预计这不会是公认的答案,因为Debug.Print是进行IDE测试的方法.

但是,为了展示如何在VB6中轻松使用标准I/O流:

Option Explicit
'
'Reference to Microsoft Scripting Runtime.
'

Public SIn As Scripting.TextStream
Public SOut As Scripting.TextStream

'--- Only required for testing in IDE or Windows Subsystem ===
Private Declare Function AllocConsole Lib "kernel32" () As Long
Private Declare Function GetConsoleTitle Lib "kernel32" _
    Alias "GetConsoleTitleA" ( _
    ByVal lpConsoleTitle As String, _
    ByVal nSize As Long) As Long
Private Declare Function FreeConsole Lib "kernel32" () As Long

Private Allocated As Boolean

Private Sub Setup()
    Dim Title As String

    Title = Space$(260)
    If GetConsoleTitle(Title, 260) = 0 Then
        AllocConsole
        Allocated = True
    End If
End Sub

Private Sub TearDown()
    If Allocated Then
        SOut.Write "Press enter to continue..."
        SIn.ReadLine
        FreeConsole
    End If
End Sub
'--- End testing ---------------------------------------------

Private Sub Main()
    Setup 'Omit for Console Subsystem.

    With New Scripting.FileSystemObject
        Set SIn = .GetStandardStream(StdIn)
        Set SOut = .GetStandardStream(StdOut)
    End With

    SOut.WriteLine "Any output you want"
    SOut.WriteLine "Goes here"

    TearDown 'Omit for Console Subsystem.
End Sub

请注意,VB6中的实际Console程序只需要很少的代码.其中大部分是在程序未在控制台子系统中运行时分配控制台窗口.