Error found during comfile~ please help

Hi, everyone

I am just trying to run some simple example file (from the board)

well...the code seems work fine....but..when i do the complie

Firstly, i did build the solution and the window said something like below:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Build startrd: project:wincai03..............

Compiling....

WINCAI03.C

can not open include file:'windows.h': No such file or directory

=====Build:0 succeeded, 1 failed, 0 up -to -date.0 skipped===

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

So i was wondering what is about this windows.h file.....

Can anyone help me please

Thanks