绘制鼠标指针图标? [英] Draw mouse pointer icon?

问题描述

我正在编写有趣的小工具.我希望能够在与原始鼠标不同的位置绘制第二个(或更多个)鼠标指针图标，但要根据原始鼠标的移动来移动它.

I am coding little fun gadget. I want to be able to draw second (or more) mouse pointer icons at different location than the original mouse but to move it according to move of original mouse.

我知道如何跟踪鼠标的移动，但是我不知道如何绘制/重新绘制鼠标指针；有人可以帮忙吗?

I know how to track movement of the mouse but I dunno how to draw/redraw mouse pointer; can anyone help?

推荐答案

可以这样做:

1. 使用 .只需指定NULL和所需的游标即可.或者只是为光标加载位图.现在，您有了一个位图.

1. grab the current mouse cursor from your application, using LoadCursor(). Just specify NULL, and the cursor you want. Or just load a bitmap for the cursor. Now, you have a bitmap.

下一步是获取桌面的设备上下文:

Next step is to get the Device context of your Desktop: GetWindowDC(NULL). This will give you the opportunity to draw on the desktop anywhere.

您很有可能需要申请 CreateCompatibleBitmap() 到#1处的图片，并在#2处获得DC.

There is a huge chance that you will need to apply CreateCompatibleBitmap() to the Image at #1 with the DC obtained at #2.

现在，使用一些 BitBlt() 从要放置光标的位置将#2处获得的DC中的OUT位复制到保存图像中(您将需要创建这些图像).

Now, use some BitBlt() to copy bits OUT from the DC obtained at #2 into a save image (YOU will need to create these) from the position you want to put your cursor.

现在，将在#3处获得的图像放在所需位置的在#2处获得的桌面的DC上.

Now, put the image obtained at #3 onto the DC of the Desktop obtained at #2 at the position you want.

当用户移动鼠标时，使用保存在#4处的数据将图像恢复到桌面上.释放所有不需要的东西(是的，这是强制性的).

When the user moved the mouse restore the image on the desktop with the saved data at #4. Release all the stuff you don't need (yes, this is mandatory).

然后从#1重新开始.

另外两个链接可能会有所帮助:

These two more links might help:

位图，设备上下文和BitBlt

捕获图像

祝你好运！

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