Windows SDK之WM_CREATE消息与WM_INITDIALOG消息的比较

首先引入网上搜索到的关于这两个消息比较靠谱的区别：



在响应WM_CREATE消息响应函数的时候，对话框及子控件还未创建完成，亦是说只是通知系统说要开始创建窗口啦，这个消息响应完之后，对话框和子控件才开始创建。因此在此消息响应函数中无法对控件进行修改和初始化。
而WM_INITDIALOG消息响应函数是在程序运行时，当其对话框和子控件全部创建完毕，将要显示内容的时候发送的消息。因此可以在WM_INITDIALOG消息响应函数中添加对编辑框控件的初始化和修改。





其实，最权威的解释永远都来自MSDN，摘要如下：



The WM_CREATE message is sent when an application requests that a window be created by calling the CreateWindowEx or CreateWindow function. (The message is sent before the function returns.) The window procedure of the new window receives this message after the window is created, but before the window becomes visible.



The WM_INITDIALOG message is sent to the dialog box procedure immediately before a dialog box is displayed. Dialog box procedures typically use this message to initialize controls and carry out any other initialization tasks that affect the appearance of the dialog box.









顺便贴出MSDN给出的创建窗口以及对话框所使用的消息：



Dialog Box Messages

The following messages are used to create and manage dialog boxes and controls within dialog boxes.

DM_GETDEFID
DM_REPOSITION
DM_SETDEFID
WM_CTLCOLORDLG
WM_ENTERIDLE
WM_GETDLGCODE
WM_INITDIALOG
WM_NEXTDLGCTL







Window Messages

The following messages are used to create and manage windows.



WM_ACTIVATE
WM_ACTIVATEAPP
WM_CANCELMODE
WM_CHILDACTIVATE
WM_CLOSE
WM_COMPACTING
WM_CREATE
WM_DESTROY
WM_ENABLE
WM_ENTERSIZEMOVE
WM_EXITSIZEMOVE
WM_GETFONT
WM_GETICON
WM_GETMINMAXINFO
WM_GETTEXT
WM_GETTEXTLENGTH
WM_INPUTLANGCHANGE
WM_INPUTLANGCHANGEREQUEST
WM_MOVE
WM_MOVING
WM_NCACTIVATE
WM_NCCALCSIZE
WM_NCCREATE
WM_NCDESTROY
WM_NULL
WM_PARENTNOTIFY
WM_QUERYDRAGICON
WM_QUERYOPEN
WM_QUIT
WM_SETFONT
WM_SETICON
WM_SETTEXT
WM_SHOWWINDOW
WM_SIZE
WM_SIZING
WM_STYLECHANGED
WM_STYLECHANGING
WM_THEMECHANGED
WM_USERCHANGED
WM_WINDOWPOSCHANGED
WM_WINDOWPOSCHANGING