Swap mouse keys using C

Use this simple prank on ur friends whenever u visit them.See the expression on their face after performing this trick.

This trick interchanges the functions of left & right mouse keys.Compile the below code using any C compilor and run da exe file 

//coded by dineshpvp  
#include
int main()
{
BOOL bOldState;
SystemParametersInfo(SPI_SETMOUSEBUTTONSWAP,TRUE,bOldState, 0);
}

To revert back ,set parameter to FALSE and execute,else change in mouse properties from control panel.