VB调用API函数创建控制台窗口

Module 项向工程文件中加入一个模块，然后在
这个Module中加入以下代码：

Option Explicit

Private Declare Function AllocConsole Lib "kernel32" () As Long

Private Declare Function FreeConsole Lib "kernel32" () As Long

Private Declare Function GetStdHandle Lib "kernel32" _
(ByVal nStdHandle As Long) As Long

Private Declare Function ReadConsole Lib "kernel32" Alias _
"ReadConsoleA" (ByVal hConsoleInput As Long, _
ByVal lpBuffer As String, ByVal nNumberOfCharsToRead As Long, _
lpNumberOfCharsRead As Long, lpReserved As Any) As Long

Private Declare Function SetConsoleMode Lib "kernel32" (ByVal _
hConsoleOutput As Long, dwMode As Long) As Long

Private Declare Function SetConsoleTextAttribute Lib _
"kernel32" (ByVal hConsoleOutput As Long, ByVal _
wAttributes As Long) As Long

Private Declare Function SetConsoleTitle Lib "kernel32" Alias _
"SetConsoleTitleA" (ByVal lpConsoleTitle As String) As Long

Private Declare Function WriteConsole Lib "kernel32" Alias _
"WriteConsoleA" (ByVal hConsoleOutput As Long, _
ByVal lpBuffer As Any, ByVal nNumberOfCharsToWrite As Long, _
lpNumberOfCharsWritten As Long, lpReserved As Any) As Long

Private Const STD_INPUT_HANDLE = -10&
Private Const STD_OUTPUT_HANDLE = -11&
Private Const STD_ERROR_HANDLE = -12&

Private Const FOREGROUND_BLUE = &H1
Private Const FOREGROUND_GREEN = &H2
Private Const FOREGROUND_RED = &H4
Private Const FOREGROUND_INTENSITY = &H8
Private Const BACKGROUND_BLUE = &H10
Private Const BACKGROUND_GREEN = &H20
Private Const BACKGROUND_RED = &H40
Private Const BACKGROUND_INTENSITY = &H80

'For SetConsoleMode (input)
Private Const ENABLE_LINE_INPUT = &H2
Private Const ENABLE_ECHO_INPUT = &H4
Private Const ENABLE_MOUSE_INPUT = &H10
Private Const ENABLE_PROCESSED_INPUT = &H1
Private Const ENABLE_WINDOW_INPUT = &H8
'For SetConsoleMode (output)
Private Const ENABLE_PROCESSED_OUTPUT = &H1
Private Const ENABLE_WRAP_AT_EOL_OUTPUT = &H2

'''''G L O B A L S'''''''''''''''''''''''''''''''''''
Private hConsoleIn As Long ' The console's input handle
Private hConsoleOut As Long ' The console's output handle
Private hConsoleErr As Long ' The console's error handle

'''''M A I N'''''''''''''''''''''''''''''''''''''''''
Private Sub Main()
    Dim szUserInput As String

    AllocConsole    '建立一个控制台窗口
    SetConsoleTitle "VB Console Example" '设置窗口标题

    '获得控制窗口的句柄
    hConsoleIn = GetStdHandle(STD_INPUT_HANDLE)
    hConsoleOut = GetStdHandle(STD_OUTPUT_HANDLE)
    hConsoleErr = GetStdHandle(STD_ERROR_HANDLE)

    SetConsoleTextAttribute hConsoleOut, _
    FOREGROUND_RED Or FOREGROUND_GREEN _
    Or FOREGROUND_BLUE Or FOREGROUND_INTENSITY _
    Or BACKGROUND_BLUE

    ConsolePrint "VB Console Example" & vbCrLf
     
    SetConsoleTextAttribute hConsoleOut, _
    FOREGROUND_RED Or FOREGROUND_GREEN _
    Or FOREGROUND_BLUE
     
    ConsolePrint "Please Enter Your Name Here--> "

    '获得用户名
    szUserInput = ConsoleRead()
    If Not szUserInput = vbNullString Then
        ConsolePrint "Hello, " & szUserInput & "!" & vbCrLf
    Else
        ConsolePrint "Hello,But who are you?" & vbCrLf
    End If

    ConsolePrint "Press Enter To Close The Console"
    Call ConsoleRead

    FreeConsole ' Destroy the console
End Sub


Private Sub ConsolePrint(szOut As String)
    WriteConsole hConsoleOut, szOut, Len(szOut), vbNull, vbNull
End Sub

Private Function ConsoleRead() As String
    Dim sUserInput As String * 256
     
    Call ReadConsole(hConsoleIn, sUserInput, Len(sUserInput), vbNull, vbNull)
    'Trim off the NULL charactors and the CRLF.
    ConsoleRead = Left$(sUserInput, InStr(sUserInput, Chr$(0)) - 3)
End Function
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