请问如何得到桌面图标大小改变的消息？

[cx820402]

请问是什么消息呢，谢谢！

[cx820402]

有没有简单的消息的呢，这是最简单的。

[rspider2003]

WM_DISPLAYCHANGE

[biweilun]

整个的桌面其实就是一个SysListView32控件，获取桌面图标的大小可以用sendmessage给桌面发送lvm_getitemrect消息，获取桌面图标的位置可以用sendmessage发送LVM_GETITEMPOSITION消息，设置图标位置可以用sendmessage给桌面发送LVM_SETITEMPOSITION消息：


LVM_GETITEMPOSITION Message

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Retrieves the position of a list-view item. You can send this message explicitly or by using the ListView_GetItemPosition macro.

Syntax


To send this message, call the SendMessage function as follows.
lResult = SendMessage( // returns LRESULT in lResult
(HWND)hWndControl, // handle to destination control
(UINT) LVM_GETITEMPOSITION, // message ID
(WPARAM) wParam, // = (WPARAM) (int) i;
(LPARAM) lParam // = (LPARAM) (POINT*) ppt;
);
Parameters

i
Index of the list-view item.
ppt
Pointer to a POINT structure that receives the position of the item's upper-left corner, in view coordinates.
Return Value

Returns TRUE if successful, or FALSE otherwise.


*******************************************************************************


LVM_SETITEMPOSITION Message

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Moves an item to a specified position in a list-view control (must be in icon or small icon view). You can send this message explicitly or by using the ListView_SetItemPosition macro.


To send this message, call the SendMessage function as follows.
Syntax

lResult = SendMessage( // returns LRESULT in lResult
(HWND) hWndControl, // handle to destination control
(UINT) LVM_SETITEMPOSITION, // message ID
(WPARAM) wParam, // = (WPARAM) (int) i
(LPARAM) lParam // = (LPARAM) MAKELPARAM ((int) x, (int) y)
);

Parameters

i
Index of the list-view item.
x
New x-position of the item's upper-left corner, in view coordinates.
y
New y-position of the item's upper-left corner, in view coordinates.
Return Value

Returns TRUE if successful, or FALSE otherwise.