作者：朱金灿

来源：http://blog.csdn.net/clever101

一般而言，在 Windows编程中创建对话框需要先定义一个对话框资源。我想能不能不用资源文件单纯通过代码创建对话框呢？晚上搜索了一些资料，研究了一下，基本实现了。

我写了一个KDialog，代码如下（代码中有一些注释，相信大家能基本看懂）：

头文件的代码：

// kdialog.h
#ifndef KDIALOG_H_INCLUDED
#define KDIALOG_H_INCLUDED#define ID_HELP   150
#define ID_EDIT   180
#define ID_TEXT   200class KDialog
{
public:KDialog(HINSTANCE hinst, HWND hwndOwner);~KDialog();virtual INT_PTR DoModal();protected:// API中注册的消息处理函数，不能是成员函数，因为成员函数有this指针static BOOL CALLBACK DialogProc(HWND hWnd,UINT uMsg, WPARAM wParam, LPARAM lParam);private:HWND  m_hOwnerWnd;HINSTANCE m_hInst;};#endif // KDIALOG_H_INCLUDED

Cpp文件的代码：

#include "kdialog.h"#include "resource.h"BOOL CALLBACK DialogProc (HWND, UINT, WPARAM, LPARAM) ;LPWORD lpwAlign ( LPWORD lpIn)
{ULONG ul;ul = (ULONG) lpIn;ul +=3;ul >>=2;ul <<=2;return (LPWORD) ul;
}KDialog::KDialog(HINSTANCE hinst, HWND hwndOwner)
{m_hInst = hinst;m_hOwnerWnd = hwndOwner;
}KDialog::~KDialog()
{}char nEditTwo[128]= "从这儿输入字符串." ;BOOL CALLBACK KDialog::DialogProc(HWND hDlg,UINT uMsg, WPARAM wParam, LPARAM lParam)
{switch (uMsg){case WM_INITDIALOG :SetDlgItemText ( hDlg, ID_EDIT, nEditTwo );return TRUE ;case WM_COMMAND :switch (LOWORD (wParam)){case ID_EDIT :GetDlgItemText (hDlg, ID_EDIT, nEditTwo, 127);return TRUE;case ID_HELP :MessageBox( NULL, nEditTwo, "输入数据", MB_OK | MB_SYSTEMMODAL | MB_NOFOCUS);return TRUE;case IDOK :EndDialog (hDlg, 0) ;return TRUE ;}break ;case WM_CLOSE:EndDialog (hDlg, 0) ;return TRUE ;default:break;}return FALSE ;
}INT_PTR KDialog::DoModal()
{HGLOBAL hgbl;LPDLGTEMPLATE lpdt;LPDLGITEMTEMPLATE lpdit;LPWORD lpw;LPWSTR lpwsz;LRESULT ret;int nchar;hgbl = GlobalAlloc(GMEM_ZEROINIT, 1024);if (!hgbl)return -1;lpdt = (LPDLGTEMPLATE)GlobalLock(hgbl);// Define a dialog box.lpdt->style = WS_POPUP | WS_BORDER | WS_SYSMENU| DS_MODALFRAME | WS_CAPTION;lpdt->cdit = 3;  // number of controlslpdt->x  = 10;lpdt->y  = 10;lpdt->cx = 100;lpdt->cy = 70;lpw = (LPWORD) (lpdt + 1);*lpw++ = 0;   // no menu*lpw++ = 0;   // predefined dialog box class (by default)lpwsz = (LPWSTR) lpw;nchar = 1+ MultiByteToWideChar (CP_ACP, 0, "内存对话框", -1,lpwsz, 50);lpw   += nchar;//-----------------------// Define an OK button.//-----------------------lpw = lpwAlign (lpw);lpdit = (LPDLGITEMTEMPLATE) lpw;lpdit->x  = 10;lpdit->y  = 50;lpdit->cx = 80;lpdit->cy = 15;lpdit->id = IDOK;  // OK button identifierlpdit->style = WS_CHILD | WS_VISIBLE | BS_DEFPUSHBUTTON;lpw = (LPWORD) (lpdit + 1);*lpw++ = 0xFFFF;*lpw++ = 0x0080;    // button classlpwsz = (LPWSTR) lpw;nchar = 1+MultiByteToWideChar (CP_ACP, 0, "退出", -1, lpwsz, 50);lpw   += nchar;*lpw++ = 0;              // no creation data//-----------------------// Define a Help button.//-----------------------lpw = lpwAlign (lpw);lpdit = (LPDLGITEMTEMPLATE) lpw;lpdit->x  = 10;lpdit->y  = 30;lpdit->cx = 80;lpdit->cy = 15;lpdit->id = ID_HELP;    // Help button identifierlpdit->style = WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON;lpw = (LPWORD) (lpdit + 1);*lpw++ = 0xFFFF;*lpw++ = 0x0080;                 // button class atomlpwsz = (LPWSTR) lpw;nchar = 1+MultiByteToWideChar (CP_ACP, 0, "显示输入", -1, lpwsz, 50);lpw   += nchar;*lpw++ = 0;                      // no creation data//-----------------------// Define a EDIT.//-----------------------lpw = lpwAlign (lpw);lpdit = (LPDLGITEMTEMPLATE) lpw;lpdit->x  = 10;lpdit->y  = 10;lpdit->cx = 80;lpdit->cy = 12;lpdit->id = ID_EDIT;    // Help button identifierlpdit->style = ES_LEFT | WS_BORDER | WS_TABSTOP | WS_CHILD | WS_VISIBLE;lpw = (LPWORD) (lpdit + 1);*lpw++ = 0xFFFF;*lpw++ = 0x0081;                 // edit class atom*lpw++ = 0;                      // no creation dataGlobalUnlock(hgbl);ret = DialogBoxIndirect(m_hInst,(LPDLGTEMPLATE) hgbl,m_hOwnerWnd,(DLGPROC) DialogProc);GlobalFree(hgbl);return ret;
}

外部调用的方法也很简单（把应用程序句柄和对话框的所有者窗口句柄传进来即可）：

             KDialog dlg(m_hInst,m_hWnd);dlg.DoModal();

上面创建的是模式对话框，下面是创建非模式对话框的代码：

BOOL KDialog::DoModeless()
{HGLOBAL hgbl;LPDLGTEMPLATE lpdt;LPDLGITEMTEMPLATE lpdit;LPWORD lpw;LPWSTR lpwsz;LRESULT ret;int nchar;hgbl = GlobalAlloc(GMEM_ZEROINIT, 1024);if (!hgbl)return FALSE;lpdt = (LPDLGTEMPLATE)GlobalLock(hgbl);// Define a dialog box.lpdt->style = WS_POPUP | WS_BORDER | WS_SYSMENU| DS_MODALFRAME | WS_CAPTION;lpdt->cdit = 3;  // number of controlslpdt->x  = 10;lpdt->y  = 10;lpdt->cx = 100;lpdt->cy = 70;lpw = (LPWORD) (lpdt + 1);*lpw++ = 0;   // no menu*lpw++ = 0;   // predefined dialog box class (by default)lpwsz = (LPWSTR) lpw;nchar = 1+ MultiByteToWideChar (CP_ACP, 0, "内存对话框", -1,lpwsz, 50);lpw   += nchar;//-----------------------// Define an OK button.//-----------------------lpw = lpwAlign (lpw);lpdit = (LPDLGITEMTEMPLATE) lpw;lpdit->x  = 10;lpdit->y  = 50;lpdit->cx = 80;lpdit->cy = 15;lpdit->id = IDOK;  // OK button identifierlpdit->style = WS_CHILD | WS_VISIBLE | BS_DEFPUSHBUTTON;lpw = (LPWORD) (lpdit + 1);*lpw++ = 0xFFFF;*lpw++ = 0x0080;    // button classlpwsz = (LPWSTR) lpw;nchar = 1+MultiByteToWideChar (CP_ACP, 0, "退出", -1, lpwsz, 50);lpw   += nchar;*lpw++ = 0;              // no creation data//-----------------------// Define a Help button.//-----------------------lpw = lpwAlign (lpw);lpdit = (LPDLGITEMTEMPLATE) lpw;lpdit->x  = 10;lpdit->y  = 30;lpdit->cx = 80;lpdit->cy = 15;lpdit->id = ID_HELP;    // Help button identifierlpdit->style = WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON;lpw = (LPWORD) (lpdit + 1);*lpw++ = 0xFFFF;*lpw++ = 0x0080;                 // button class atomlpwsz = (LPWSTR) lpw;nchar = 1+MultiByteToWideChar (CP_ACP, 0, "显示输入", -1, lpwsz, 50);lpw   += nchar;*lpw++ = 0;                      // no creation data//-----------------------// Define a EDIT.//-----------------------lpw = lpwAlign (lpw);lpdit = (LPDLGITEMTEMPLATE) lpw;lpdit->x  = 10;lpdit->y  = 10;lpdit->cx = 80;lpdit->cy = 12;lpdit->id = ID_EDIT;    // Help button identifierlpdit->style = ES_LEFT | WS_BORDER | WS_TABSTOP | WS_CHILD | WS_VISIBLE;lpw = (LPWORD) (lpdit + 1);*lpw++ = 0xFFFF;*lpw++ = 0x0081;                 // edit class atom*lpw++ = 0;                      // no creation dataGlobalUnlock(hgbl);HWND hDlg = CreateDialogIndirect(m_hInst,(LPDLGTEMPLATE) hgbl,m_hOwnerWnd,(DLGPROC) DialogProc);if(NULL==hDlg)return FALSE;::ShowWindow(hDlg,SW_SHOW);GlobalFree(hgbl);return TRUE;
}

效果图如下：

具体的实现原理，大家请参考这篇文章：对话框模板，RegexTest，微软官网上也有相关的文章：UsingDialog Boxes。此外CodeProject上的一个例子：UsingDialog Templates to create an InputBox() in C++