用CreateWindowEx创建模态对话框

SDK下，我们通常用DialogBox来创建模态对话框。DialogBox并不是一个Win32的API，它实际上是一个宏，调用DialogBoxParam来创建对话框。我们能在中看到这样的宏定义：

#define DialogBoxA(hInstance, lpTemplate, hWndParent, lpDialogFunc) /

DialogBoxParamA(hInstance, lpTemplate, hWndParent, lpDialogFunc, 0L)

#define DialogBoxW(hInstance, lpTemplate, hWndParent, lpDialogFunc) /

DialogBoxParamW(hInstance, lpTemplate, hWndParent, lpDialogFunc, 0L)

#ifdef UNICODE

#define DialogBox DialogBoxW

#else

#define DialogBox DialogBoxA

#endif // !UNICODE

而在MSDN上，DialogBoxParam的Remark里边又这么说“The DialogBoxParam function uses the CreateWindowEx function to create the dialog box”，看来似乎用CreateWindowEx也就能搞定了。建一个SDK的工程，用下面的代码，果然，模态对话框弹出来了。

// SDKDialog.cpp : Defines the entry point for the application.

//



#include "stdafx.h"

#include "SDKDialog.h"



#define MAX_LOADSTRING 100



// Global Variables:

TCHAR szTitle[MAX_LOADSTRING]; // The title bar text



int APIENTRY _tWinMain(HINSTANCE hInstance,

HINSTANCE hPrevInstance,

LPTSTR lpCmdLine,

int nCmdShow)

{

UNREFERENCED_PARAMETER(hPrevInstance);

UNREFERENCED_PARAMETER(lpCmdLine);



// TODO: Place code here.

MSG msg;

HACCEL hAccelTable;



// Initialize global strings

LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);



// Perform application initialization:

HWND hWnd = CreateWindowEx(WS_EX_APPWINDOW, _T("#32770"), szTitle, WS_OVERLAPPEDWINDOW,

CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

ShowWindow(hWnd, nCmdShow);

UpdateWindow(hWnd);



hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_SDKDIALOG));



// Main message loop:

while (GetMessage(&msg, NULL, 0, 0))

{

if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))

{

TranslateMessage(&msg);

DispatchMessage(&msg);

}

}



return (int) msg.wParam;

}



可是，弹是弹出来了，关不掉啊。试试看加个DialogProc，还是关不掉。子类化吧，在_tWinMain前加上

WNDPROC hWndProc;

LRESULT CALLBACK WindowProc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)

{

switch (uMsg)

{

case WM_CLOSE:

DestroyWindow(hWnd);

return 0;



case WM_DESTROY:

PostQuitMessage (0);

break;



default:

return CallWindowProc(hWndProc, hWnd, uMsg, wParam, lParam);

}

return 0;

}

_tWinMain中CreateWindowEx之后还有

hWndProc = (WNDPROC)S

etWindowLongPtr(hWnd, GWLP_WNDPROC, (LONG_PTR)(WNDPROC)WindowProc);



这下也可以也能把对话框窗口关掉了，但是新问题又出来了，WM_CREATE和WM_INITDIALOG好像都没有响应，怎么初始化对话框呢？DialogBoxParam 的Remark部分还有一段话，
DialogBoxParam then sends a WM_INITDIALOG message (and a WM_SETFONT message if the template specifies the DS_SETFONT or DS_SHELLFONT style) to the dialog box procedure. The function displays the dialog box (regardless of whether the template specifies the WS_VISIBLE style), disables the owner window, and starts its own message loop to retrieve and dispatch messages for the dialog box.
看到了吧，自己发一个WM_INITDIALOG过去就是了。（需要的话，再发送一个WM_SETFONT）。大功告成！


ps，如果不自己发送一条WM_INITDIALOG消息的话，WM_INITDIALOG、WM_CREATE、WM_NCCREATE消息都不会收到；这个对话框收到的第一条消息将是WM_GETMINMAXINFO。