请问CMyDlg *pDlg=(CMyDlg*)pParam和CMyDlg Dlg的区别

luckyjiao 2001-11-06 02:11:50
能不能详细解释一下
CMyDlg *pDlg;
pDlg->
CMyDlg Dlg;
Dlg.
的各自使用,区别
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luckyjiao 2001-11-26
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那我给谁分呀?
seesi 2001-11-19
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已经很清楚了...

seesi.top263.net

共同进步!
luckyjiao 2001-11-19
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这个问题有那么难吗?
luckyjiao 2001-11-13
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我是学习多线程的时候用的第一种方法,也就是指针,谢谢各位意见,我一定给分,但是我还是不理解,什么时候该用第一种,什么时候该用第二种,有时候两种方法不是都可以使用的。
juqiang 2001-11-06
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前者的用法一般用在Enum...这类枚举函数上,我估计你的代码也是从调用这种函数的示例中摘抄的。
awanghero 2001-11-06
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CMyDlg Dlg
void* pVoid=&Dlg;
CMyDlg *pDlg=(CMyDlg *)pVoid;
则有pDlg->DoModal()==Dlg.DoMadal()一样的效果!
ineedyou 2001-11-06
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CMyDlg *pDlg;是一个指针,用的时候要初始化,要不让它指向于一个已存在的对象,要就new一个新的对象,pDlg=new CMyDlg ;这样的话,不用的时候要记得删除它(delete pDlg),用的时候还要create()和showwindow()。
CMyDlg Dlg;是一个实例对象,可以直接用它,但也要create()和showwindow()。只是不用删除它,程序退出的时候自己会删除它。
luxes 2001-11-06
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后面那个是真正有这么一个东西 CMyDlg的对象存在。
而前者只是一个指针,说是要指向一个CMyDlg的对象,可这个对象在哪儿?如果没有指定便使用,就会出错。一般是new一个CMyDlg,让这个指针指向它
kingzai 2001-11-06
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CMyDlg Dlg要调用默认的构造函数,前面不用。
yaya_zhu 2001-11-06
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前面是个实例指针,后面是个实例。
======================================================================== MICROSOFT FOUNDATION CLASS LIBRARY : 考试 ======================================================================== AppWizard has created this 考试 application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application. This file contains a summary of what you will find in each of the files that make up your 考试 application. 考试.dsp This file (the project file) contains information at the project level and is used to build a single project or subproject. Other users can share the project (.dsp) file, but they should export the makefiles locally. 考试.h This is the main header file for the application. It includes other project specific headers (including Resource.h) and declares the CMyApp application class. 考试.cpp This is the main application source file that contains the application class CMyApp. 考试.rc This is a listing of all of the Microsoft Windows resources that the program uses. It includes the icons, bitmaps, and cursors that are stored in the RES subdirectory. This file can be directly edited in Microsoft Visual C++. 考试.clw This file contains information used by ClassWizard to edit existing classes or add new classes. ClassWizard also uses this file to store information needed to create and edit message maps and dialog data maps and to create prototype member functions. res\考试.ico This is an icon file, which is used as the application's icon. This icon is included by the main resource file 考试.rc. res\考试.rc2 This file contains resources that are not edited by Microsoft Visual C++. You should place all resources not editable by the resource editor in this file. ///////////////////////////////////////////////////////////////////////////// AppWizard creates one dialog class: 考试Dlg.h, 考试Dlg.cpp - the dialog These files contain your CMyDlg class. This class defines the behavior of your application's main dialog. The dialog's template is in 考试.rc, which can be edited in Microsoft Visual C++. ///////////////////////////////////////////////////////////////////////////// Other standard files: StdAfx.h, StdAfx.cpp These files are used to build a precompiled header (PCH) file named 考试.pch and a precompiled types file named StdAfx.obj. Resource.h This is the standard header file, which defines new resource IDs. Microsoft Visual C++ reads and updates this file. ///////////////////////////////////////////////////////////////////////////// Other notes: AppWizard uses "TODO:" to indicate parts of the source code you should add to or customize. If your application uses MFC in a shared DLL, and your application is in a language other than the operating system's current language, you will need to copy the corresponding localized resources MFC42XXX.DLL from the Microsoft Visual C++ CD-ROM onto the system or system32 directory, and rename it to be MFCLOC.DLL. ("XXX" stands for the language abbreviation. For example, MFC42DEU.DLL contains resources translated to German.) If you don't do this, some of the UI elements of your application will remain in the language of the operating system. /////////////////////////////////////////////////////////////////////////////

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