Changing the size of controls like Checkboxes etc

Question

Hello,
I'm developing a touch screen application.
Its the first time I've developed for a touchscreen.
I find that the normal windows controls I use, in applications accessed via the mouse, are just too small for someone to access with their fingers.
I'm using one of those new listboxes with checkboxes built in. so the use selects a line and checks or unchecks the checkbox.
These lines are a bit too close together and the checkboxes are a bit too small...
I'm writing this in VS2005 c#. I can't see any properties I could change that would make a difference to either the line spacing or the checkbox size.

Is it a case of writing custom controls? Is there anyone out there selling a set of supersize controls?

Thanks
Vida