How to make a Mac Application that enlarge the Mouse Pointer [duplicate]

This question already exists: Closed 11 years ago.

Possible Duplicate:

How to Change Mouse Pointer in Mac?

what software I need to make a new application? with objective-c Language programming?

I want to make the mouse Pointer bigger so my kid can see that. The program will be residential like cinch. Then if I click t开发者_高级运维he button I want a beep sound and a visual cue show up. That way I can train my 2 years old daughter to use the mouse.

How to do so?

I am familiar with objective-c but is currently building a program for IPhone. I want to make a program for iMac but the program should work like cinch (rather than windowed program)

NOTE: This is not a duplicate. I am not asking how to enlarge mouse pointer. I am asking how to make a program to enlarge mouse pointer (so I can sell the program and practice objective-c, etc.). Also using the answer from the other answers sucks because the mouse button will show pixels. I want users to be able to customize their mouse pointers more comprehensively with a click of a button.

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No need to write any software. No need even to install any software.

System Preferences => Universal Access => Mouse & Trackpad => Cursor Size: