The cursor is used to indicate the position of text input. It is initially hidden and must be made visible using the WinShowCursor function.

This function destroys any existing cursor, as it is confusing to the user if two cursors are visible at any one time. An application creates and displays a cursor when it has the input focus, or is the active window. Creating a cursor at any other time can stop the cursor from flashing in another window. Similarly, when the application loses the input focus or becomes inactive, it destroys its cursor using the WinDestroyCursor function.

The cursor width is generally specified as 0 (nominal border width is used). This is preferable to a value of 1, for example, as such a fine width is almost invisible on a high-resolution device.

When ulrgf is set to CURSOR_FLASH, TID_CURSOR timer is created.