PeekMessage() 重置鼠标光标

发布于 2024-08-13 14:56:56 字数 862 浏览 3 评论 0原文

我目前正在尝试在 Windows XP 的 C++ 应用程序之类的游戏中更改鼠标光标。

要更改光标，我使用 SetCursor() 并传入所需的光标，该光标正在工作。然而，在调用 PeekMessage() 的 while 循环期间，光标不断重置回默认箭头。

这是有问题的循环：

MSG  msg;
while( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) )
{
    TranslateMessage( &msg );
    DispatchMessage( &msg );
}

在调试时，我发现光标在调用 PeekMessage() 期间发生了变化，之后 msg.message == 0x200，这应该使消息成为以下之一：

WM_MOUSEFIRST = 0x200
WM_MOUSEMOVE = 0x200

我没有能够找到有关为什么会发生这种情况的任何信息，并且没有使用 Windows 消息的经验。

谢谢。

编辑：

根据此处< /a> 每次鼠标移动时，系统都会重新绘制类光标，从而有效地将其设置回默认光标。考虑到这一点，我将其添加到窗口消息回调函数中：

case WM_SETCURSOR:
    return 0;

问题解决了。

原文

Im currently messing around with changing the mouse cursor within a game like C++ application for Windows XP.

To change the cursor I am using SetCursor() and passing in the desired cursor, which is working. However during the while loop in which PeekMessage() is called the cursor keep getting reset back to the default arrow.

This is the offending loop:

MSG  msg;
while( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) )
{
    TranslateMessage( &msg );
    DispatchMessage( &msg );
}

While debugging I found that the cursor changed during the call to PeekMessage() after which msg.message == 0x200, which should make the message one of these:

WM_MOUSEFIRST = 0x200
WM_MOUSEMOVE = 0x200

I haven't been able to find any information on why this is happening, and have no experience with windows messages.

Thanks.

Edit:

According to here the system redraws the class cursor everytime the mouse moves, effectively setting it back to the default cursor. With this in mind i added this to the window message callback function: