用Win32API編寫的InputBox對話方塊。

VB下面的InputBox函數很好用，簡單方便，很多場合都要用到它，VC++6下卻沒有現成的InputBox函數可以調，難道必須添加一個Dialog、拖放幾個控制項才能夠實現麼，一直在尋找，可否僅編寫代碼就可寫一個類似VB InputBox的函數或者類呢？網上一番尋找，該想法確實是可行的，而且早有先行者實現了(在CodeProject網站，已經有人實現了改代碼)，下載下來研究一番並共用出來，代碼如下：
（出處：http://www.codeproject.com/KB/dialog/inputbox.aspx）

inputbox.h----------------------------------------------------
// InputBox.h: interface for the CInputBox class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_INPUTBOX_H__0BE6B01B_C74A_45FE_AF35_D6E8E4B65A1B__INCLUDED_)
#define AFX_INPUTBOX_H__0BE6B01B_C74A_45FE_AF35_D6E8E4B65A1B__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#define INPUTBOX_WIDTH 400
#define INPUTBOX_HEIGHT 125

/*
Author : mah
Date : 13.06.2002
Description :
similar to Visual Basic InputBox
*/
class CInputBox
{
static HFONT m_hFont;
static HWND m_hWndInputBox;
static HWND m_hWndParent;
static HWND m_hWndEdit;
static HWND m_hWndOK;
static HWND m_hWndCancel;
static HWND m_hWndPrompt;

static HINSTANCE m_hInst;

static LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
public:
// text from InputBox
LPTSTR Text;
BOOL DoModal(LPCTSTR szCaption, LPCTSTR szPrompt);

CInputBox(HWND hWndParent);
virtual ~CInputBox();

};

#endif // !defined(AFX_INPUTBOX_H__0BE6B01B_C74A_45FE_AF35_D6E8E4B65A1B__INCLUDED_)

inputbox.cpp----------------------------------------------------
#include "stdafx.h"
#include "InputBox.h"

HFONT CInputBox::m_hFont = NULL;
HWND CInputBox::m_hWndInputBox = NULL;
HWND CInputBox::m_hWndParent = NULL;
HWND CInputBox::m_hWndEdit = NULL;
HWND CInputBox::m_hWndOK = NULL;
HWND CInputBox::m_hWndCancel = NULL;
HWND CInputBox::m_hWndPrompt = NULL;

HINSTANCE CInputBox::m_hInst = NULL;

//////////////////////////////////////////////////////////////////////
// CInputBox Class
//////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

/*
Author : mah
Date : 13.06.2002
Description :
Constructs window class InputBox
*/
CInputBox::CInputBox(HWND hWndParent)
{
HINSTANCE hInst = GetModuleHandle(NULL);

WNDCLASSEX wcex;

if (!GetClassInfoEx(hInst, "InputBox", &wcex))
{
wcex.cbSize = sizeof(WNDCLASSEX);

wcex.style= CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc= (WNDPROC)WndProc;
wcex.cbClsExtra= 0;
wcex.cbWndExtra= 0;
wcex.hInstance= hInst;
wcex.hIcon= NULL;//LoadIcon(hInst, (LPCTSTR)IDI_MYINPUTBOX);
wcex.hCursor= LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground= (HBRUSH)(COLOR_WINDOW);
wcex.lpszMenuName= NULL;
wcex.lpszClassName= "InputBox";
wcex.hIconSm= NULL;

if (RegisterClassEx(&wcex) == 0)
MessageBox(NULL, "Can't create CInputBox!", "Error", MB_OK);
}

m_hWndParent = hWndParent;

Text = NULL;

}

CInputBox::~CInputBox()
{
if (Text) delete[] Text;
}

/*
Author : mah
Date : 13.06.2002
Description : Window procedure
*/
LRESULT CALLBACK CInputBox::WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
LOGFONT lfont;

switch (message)
{
case WM_CREATE:
// font
memset(&lfont, 0, sizeof(lfont));
lstrcpy(lfont.lfFaceName, _T("Arial"));
lfont.lfHeight = 16;
lfont.lfWeight = FW_NORMAL;//FW_BOLD;
lfont.lfItalic = FALSE;
lfont.lfCharSet = DEFAULT_CHARSET;
lfont.lfOutPrecision = OUT_DEFAULT_PRECIS;
lfont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
lfont.lfQuality = DEFAULT_QUALITY;
lfont.lfPitchAndFamily = DEFAULT_PITCH;
m_hFont = CreateFontIndirect(&lfont);

m_hInst = GetModuleHandle(NULL);

// creating Edit
m_hWndEdit = CreateWindowEx(WS_EX_STATICEDGE,
"edit","",
WS_VISIBLE | WS_CHILD | WS_TABSTOP | ES_AUTOHSCROLL,
5, INPUTBOX_HEIGHT - 50, INPUTBOX_WIDTH - 16, 20,
hWnd,
NULL,
m_hInst,
NULL);

// setting font
SendMessage(m_hWndEdit, WM_SETFONT, (WPARAM)m_hFont, 0);

// button OK
m_hWndOK = CreateWindowEx(WS_EX_STATICEDGE,
"button","OK",
WS_VISIBLE | WS_CHILD | WS_TABSTOP,
INPUTBOX_WIDTH - 100, 10, 90, 25,
hWnd,
NULL,
m_hInst,
NULL);

// setting font
SendMessage(m_hWndOK, WM_SETFONT, (WPARAM)m_hFont, 0);

// button Cancel
m_hWndCancel = CreateWindowEx(WS_EX_STATICEDGE,
"button","Cancel",
WS_VISIBLE | WS_CHILD | WS_TABSTOP,
INPUTBOX_WIDTH - 100, 40, 90, 25,
hWnd,
NULL,
m_hInst,
NULL);

// setting font
SendMessage(m_hWndCancel, WM_SETFONT, (WPARAM)m_hFont, 0);

// static Propmpt
m_hWndPrompt = CreateWindowEx(WS_EX_STATICEDGE,
"static","",
WS_VISIBLE | WS_CHILD,
5, 10, INPUTBOX_WIDTH - 110, INPUTBOX_HEIGHT - 70,
hWnd,
NULL,
m_hInst,
NULL);

// setting font
SendMessage(m_hWndPrompt, WM_SETFONT, (WPARAM)m_hFont, 0);

SetFocus(m_hWndEdit);
break;
case WM_DESTROY:

DeleteObject(m_hFont);

EnableWindow(m_hWndParent, TRUE);
SetForegroundWindow(m_hWndParent);
DestroyWindow(hWnd);
PostQuitMessage(0);

break;
case WM_COMMAND:
switch (HIWORD(wParam))
{
case BN_CLICKED:
if ((HWND)lParam == m_hWndOK)
PostMessage(m_hWndInputBox, WM_KEYDOWN, VK_RETURN, 0);
if ((HWND)lParam == m_hWndCancel)
PostMessage(m_hWndInputBox, WM_KEYDOWN, VK_ESCAPE, 0);
break;
}
break;

default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}

/*
Author : mah
Date : 13.06.2002
Description :
Constructs InputBox window
*/
BOOL CInputBox::DoModal(LPCTSTR szCaption, LPCTSTR szPrompt)
{
RECT r;
GetWindowRect(GetDesktopWindow(), &r);

m_hWndInputBox = CreateWindowEx(WS_EX_TOOLWINDOW,
"InputBox",
szCaption,
WS_POPUPWINDOW | WS_CAPTION | WS_TABSTOP,
(r.right - INPUTBOX_WIDTH) / 2, (r.bottom - INPUTBOX_HEIGHT) / 2,
INPUTBOX_WIDTH, INPUTBOX_HEIGHT,
m_hWndParent,
NULL,
m_hInst,
NULL);
if(m_hWndInputBox == NULL)
return FALSE;

SetWindowText(m_hWndPrompt, szPrompt);

SetForegroundWindow(m_hWndInputBox);

EnableWindow(m_hWndParent, FALSE);

ShowWindow(m_hWndInputBox, SW_SHOW);
UpdateWindow(m_hWndInputBox);

BOOL ret = 0;

MSG msg;

HWND hWndFocused;

while (GetMessage(&msg, NULL, 0, 0))
{
if (msg.message == WM_KEYDOWN)
{
if (msg.wParam == VK_ESCAPE)
{
SendMessage(m_hWndInputBox, WM_DESTROY, 0, 0);
ret = 0;
}
if (msg.wParam == VK_RETURN)
{
int nCount = GetWindowTextLength(m_hWndEdit);
nCount++;
if (Text)
{
delete[] Text;
Text = NULL;
}
Text = new TCHAR[nCount];
GetWindowText(m_hWndEdit, Text, nCount);
SendMessage(m_hWndInputBox, WM_DESTROY, 0, 0);
ret = 1;
}
if (msg.wParam == VK_TAB)
{
hWndFocused = GetFocus();
if (hWndFocused == m_hWndEdit) SetFocus(m_hWndOK);
if (hWndFocused == m_hWndOK) SetFocus(m_hWndCancel);
if (hWndFocused == m_hWndCancel) SetFocus(m_hWndEdit);
}

}
TranslateMessage(&msg);
DispatchMessage(&msg);
}

return ret;
}

VC++6調用程式碼範例--------------------------------------------------------
    CInputBox ibox(this->m_hWnd);
    if (ibox.DoModal("Hi, it's me", "if u know what I mean!"))
       MessageBox(NULL, ibox.Text, "AAaaAA", MB_OK);

wxDev-C++調用程式碼範例---------------------------------------------------
// insert your code here
CInputBox cib((HWND__ *)this->GetHandle());
cib.DoModal("系統維護","請輸入密碼以退出程式，進行維護工作");
MessageBox(0,cib.Text,cib.Text,MB_OK);