自己简单封装的一个CDialog类实例

#include 
class CDialog
{
public:
 //一条消息所包含的信息
 struct MAP
 {
  UINT Msg;
  bool (*pf)(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam);
  int len;
  MAP *pNext;
 };
public:
 WORD m_wRes;//Dialog资源的ID
 //头、尾指针，用来操作消息列表
 static MAP *m_pHead;
 MAP *m_pEnd;
public:
 bool Show(HINSTANCE,HWND);
 void AddMsg(bool (*fp)(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam),UINT);
 static bool OnClose(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam);
 static bool OnInit(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam);
 CDialog();
private:
 static INT_PTR CALLBACK DialogProc(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam);
 void InitMap();
};
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow);

#include "Dialog.h"
CDialog* pThis;//保存基类指针
CDialog::MAP* CDialog::m_pHead = NULL;
//窗口过程函数
INT_PTR CDialog::DialogProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
 //遍历消息列表以查找是否有相应的响应函数
 CDialog::MAP* pTemp = m_pHead;
 for(int i = 1;i <= m_pHead->len;++i)
 {
  if(uMsg == pTemp->Msg)
  {
   pTemp->pf(hwndDlg,uMsg,wParam,lParam);
   return FALSE;
  }
  pTemp = pTemp->pNext;
 }
 return FALSE;
}
//创建消息列表
void CDialog::InitMap()
{
 m_pHead = new MAP;
 m_pHead->len = 2;
 m_pHead->Msg = WM_CLOSE;
 m_pHead->pf = OnClose;
 MAP *pNew = new MAP;
 pNew->Msg = WM_INITDIALOG;
 pNew->pf = OnInit;
 pNew->pNext = NULL;
 m_pHead->pNext = pNew;
 m_pEnd = pNew;
}
//消息响应函数
bool CDialog::OnClose(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
 EndDialog(hwndDlg,0);
 return true;
}
CDialog::CDialog()
{
 InitMap();
}
//程序入口函数
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow)
{
 pThis->Show(hInstance,NULL);
 return 0;
}
//显示Dialog
bool CDialog::Show(HINSTANCE hIns,HWND hParent)
{
 DialogBox(hIns,MAKEINTRESOURCE(m_wRes),hParent,DialogProc);
 return true;
}
//由子类重写此函数以在对话框初始化时进行一些操作
bool CDialog::OnInit(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
 return true;
}
//向消息列表中增加消息
void CDialog::AddMsg(bool (*fp)(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam),UINT uMsg)
{
 MAP *pNew = new MAP;
 pNew->Msg = uMsg;
 pNew->pf = fp;
 pNew->pNext = NULL;
 m_pEnd->pNext = pNew;
 m_pEnd = pNew;

 ++m_pHead->len;
}

#include "MyDlg.h"
#include "resource.h"
//定义一个指向CDialog的指针并在下面的构造函数中赋值为this
extern CDialog* pThis;
MyDlg App;
MyDlg::MyDlg()
{
 m_wRes = IDD_DIALOG1;
 pThis = this;
 AddMsg(OnCommand,WM_COMMAND);
}
//WM_COMMAND消息响应函数
bool MyDlg::OnCommand(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
 MessageBox(hwndDlg,"","",0);
 return true;
}
//WM_INITDIALOG消息响应函数
bool MyDlg::OnInit(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
 MessageBox(hwndDlg,"","",0);
 return true;
}