编写windows程序要记住的结构体

最新推荐文章于 2025-12-10 11:25:25 发布

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#windows #structure #thread #struct

MSG结构包含来自线程消息队列的消息信息。具体包括窗口句柄、消息标识符、两个额外信息参数及消息发布时间和光标位置等。该结构常用于Windows编程中处理消息。

The MSG structure contains message information from a thread's message queue.

Syntax

typedef struct {
    HWND hwnd;
    UINT message;
    WPARAM wParam;
    LPARAM lParam;
    DWORD time;
    POINT pt;
} MSG, *PMSG;

Members

hwnd
Handle to the window whose window procedure receives the message.
message
Specifies the message identifier. Applications can only use the low word; the high word is reserved by the system.
wParam
Specifies additional information about the message. The exact meaning depends on the value of the message member.
lParam
Specifies additional information about the message. The exact meaning depends on the value of the message member.
time
Specifies the time at which the message was posted.
pt
Specifies the cursor position, in screen coordinates, when the message was posted.