EM_GETOLEINTERFACE

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本文介绍如何通过发送EM_GETOLEINTERFACE消息来获取IRichEditOle对象，该对象允许客户端访问富文本控件的COM功能。文章详细说明了SendMessage函数的参数设置及返回值意义。

EM_GETOLEINTERFACE

获得IRichEditOle接口，实例化mIRichEditOle

The EM_GETOLEINTERFACE message retrieves an IRichEditOle object that a client can use to access a rich edit control's COM functionality.

To send this message, call the SendMessage function with the following parameters.

SendMessage(     
(HWND) hWnd,            // handle to destination window     
EM_GETOLEINTERFACE,     // message to send    
(WPARAM) wParam,        // not used; must be zero    
(LPARAM) lParam         // IRichEditOle object (LPVOID *)  
);

参数:

wParam 
This parameter is not used; it must be zero. 

lParam 
Pointer to a pointer that receives the IRichEditOle object. The   control calls the AddRef method   for the object 
before returning, so the calling application must call the Release method when it is done with   the object. 


返回值:

如果操作成功返回非零值.
如果操作失败返回零值.

需求:

Windows NT/2000/XP: Included in Windows NT 4.0 and later.
Windows   95/98/Me: Included in Windows 95 and later.
头文件: Declared in   Richedit.h.