How To Locate A Button

I have already done the creation of button and the dragging of button at runtime already. But now i need to know how do i save the last dragged button on the form and also detect the name of the last clicked button.

i now drag a button to coordinates 25,254. so when i exit the form and the next time i launch it, the button will still be at 25,254. and this one will go on for the number of button i created like 100. so when i launch the form the 100 button will be at the exact position where i last saved them. the second part is lets say i created button1 and button2 on the form in runtime. so when i clicked the first button, it should display button1. and if i clicked on button 2, it should say button2. same goes for like 100buttons.

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