![]() But for some operations, you might need to track the mouse position beyond this point. Capturing mouse movement outside the windowīy default, a window stops receiving WM_MOUSEMOVE messages if the mouse moves past the edge of the client area. One consequence of this behavior is that the mouse coordinates might not change between WM_MOUSEMOVE messages. For example, if the cursor is positioned over a window, and the user hides the window, the window receives WM_MOUSEMOVE messages even if the mouse did not move. Later in this topic, we will look at code that converts between the two units.Ī window can also receive a WM_MOUSEMOVE message if the position of the cursor changes relative to the window. Remember that these coordinates are in pixels, not device-independent pixels (DIPs). The following code gets the mouse coordinates from lParam. The wParam parameter contains a bitwise OR of flags, indicating the state of the other mouse buttons plus the SHIFT and CTRL keys. ![]() ![]() Use the GET_X_LPARAM and GET_Y_LPARAM macros to unpack the coordinates from lParam. The lowest 16 bits of lParam contain the x-coordinate, and the next 16 bits contain the y-coordinate. The WM_MOUSEMOVE message contains the same parameters as the messages for mouse clicks. You can override this behavior by capturing the mouse, which is described in the next section. By default, WM_MOUSEMOVE goes to the window that contains the cursor. If, for some reason, you need to keep track of the mouse pointer’s coordinates, this program can certainly get the job done.When the mouse moves, Windows posts a WM_MOUSEMOVE message. It is straightforward, and it does not even need to be installed before use. Very simple utility for users who need to track the mouse pointer’s locationĪll in all, Mouse Point Viewer is a lightweight program that shows you the coordinates of the mouse pointer on the screen and within the current window at all times. The relative coordinates are only in relation to the highlighted window, while the screen coordinates, as you can probably guess, are in relation to the entire screen. You will notice that two sets of coordinates are displayed. If you wish, you can also have the application ignore child windows. However, the utility displays other useful info as well, namely the selected window’s process ID, handle and caption. ![]() It isn’t too difficult to figure out what this application does – once launched, the mouse pointer’s coordinates are displayed in the main window, and this information is updated at a user-defined interval. View the mouse cursor’s location at all times Thankfully, though, there are only two settings available, so this shouldn’t be an issue. The application stores no data locally, but this also means your configurations are not saved. Once you have downloaded the program, you can launch it instantly from any location, which means you can use it on any PC without leaving anything behind. This is clearly a very simple application, and the good news is that it is remarkably easy to deploy. Nothing to install – just download the program and run it Additionally, it can show you each window’s process ID, handle and caption. Mouse Point Viewer is a small, open-source application that displays the current coordinates of the mouse pointer, both within the selected window and on the entire display.
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