Hold down CTRL and press X. When the box pops up, type in moneyeo and hold the SHIFT key. Alternate between hitting ENTER and the UP arrow. For each time these are both pressed, you get 10,000,000 Simoleons.
For Sim city 4 : Press [Ctrl] + X during game play to display the console window. Type one of the following codes then press [Enter] to activate the corresponding cheat function. The console window will close to confirm correct code entry.