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麻烦大家帮我详解一下WM_GETTEXT消息!

leihome 2002-05-12 07:36:10
听说,“*****”密码框的密码也能响应WM_GETTEXT消息,而取出密码,望高手帮我详解一下WM_GETTEXT消息!谢谢~
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haytree 2010-06-03
看不懂,能不能换成中文呢!!!!
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leihome 2002-05-13
我晕,MSDN全英文。不能讲讲吗?
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zdhe 2002-05-12
干吗不看一下MSDN. 你要的解释都有.
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webber84 2002-05-12
An application sends a WM_GETTEXT message to copy the text that corresponds to a window into a buffer provided by the caller.

WM_GETTEXT
wParam = (WPARAM) cchTextMax; // number of characters to copy
lParam = (LPARAM) lpszText; // address of buffer for text

Parameters
cchTextMax
Value of wParam. Specifies the maximum number of characters to be copied, including the terminating null character.
lpszText
Value of lParam. Pointer to the buffer that is to receive the text.
Return Values
The return value is the number of characters copied.

Default Action
The DefWindowProc function copies the text associated with the window into the specified buffer and returns the number of characters copied.

Remarks
For an edit control, the text to be copied is the content of the edit control. For a combo box, the text is the content of the edit control (or static-text) portion of the combo box. For a button, the text is the button name. For other windows, the text is the window title. To copy the text of an item in a list box, an application can use the LB_GETTEXT message.

When the WM_GETTEXT message is sent to a static control with the SS_ICON style, a handle to the icon will be returned in the first four bytes of the buffer pointed to by lpszText. This is true only if the WM_SETTEXT message has been used to set the icon.

In a rich edit control, if the text to be copied exceeds 64K, use either the message EM_STREAMOUT or EM_GETSELTEXT.

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