This function creates a modal dialog box from a dialog box template resource. Before displaying the dialog box, the function passes an application-defined value to the dialog box procedure as thelParam parameter of the WM_INITDIALOG message. An application can use this value to initialize dialog box controls.

int DialogBoxParam( HINSTANCE hInstance, LPCTSTR lpTemplateName, HWND hWndParent, DLGPROC lpDialogFunc, PARAM dwInitParam
); 

/******************************************************************************** File: FirstTry.cpp* Author:   guzhoudiaoke@126.com* Time:    2013-04-14* 描述：  主要尝试使用DialogBoxParam函数显式一个对话框*******************************************************************************/#include <Windows.h>
#include <Windowsx.h>
#include <tchar.h>
#include "Resource.h"// 对话框过程函数
INT_PTR WINAPI Dlg_Proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{return FALSE;
}int WINAPI _tWinMain(HINSTANCE hinstExe, HINSTANCE, PTSTR pszCmdLine, int)
{DialogBoxParam(hinstExe, MAKEINTRESOURCE(IDD_FIRSTTRY), NULL, Dlg_Proc, _ttoi(pszCmdLine));return 0;
}

运行结果：

/******************************************************************************** File: FirstTry.cpp* Author:   guzhoudiaoke@126.com* Time:    2013-04-14* 描述：  主要尝试使用DialogBoxParam函数显式一个对话框*******************************************************************************/#include <Windows.h>
#include <Windowsx.h>
#include <tchar.h>
#include "Resource.h"/* SetDlgMsgResult This macro maps to the SetWindowLong function.* SetWindowLong changes an attribute of the specified window, also sets a 32-bit (LONG) * value at the specified offset into the extra window memory of a window.* The normal HANDLE_MSG macro in WindowsX.h does not work properly for dialog* boxes because DlgProc returns a BOOL instead of an LRESULT (likeWndProcs). * This chHANDLE_DLGMSG macro corrects the problem.*/
#define chHANDLE_DLGMSG(hWnd, message, fn)                 \case (message): return (SetDlgMsgResult(hWnd, uMsg,     \HANDLE_##message((hWnd), (wParam), (lParam), (fn))))void Dlg_OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify)
{switch (id) {case IDCANCEL:EndDialog(hwnd, id);break;}
}// 对话框过程函数
INT_PTR WINAPI Dlg_Proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{switch (uMsg) {chHANDLE_DLGMSG(hwnd, WM_COMMAND,    Dlg_OnCommand);}return FALSE;
}int WINAPI _tWinMain(HINSTANCE hinstExe, HINSTANCE, PTSTR pszCmdLine, int)
{DialogBoxParam(hinstExe, MAKEINTRESOURCE(IDD_FIRSTTRY), NULL, Dlg_Proc, _ttoi(pszCmdLine));return 0;
}

其中chHANDLE_DLGMSG是原书作者对HANDLE_MSG的改进。