getting started on C programming on PIC16F628A, PIC16F690, OR PIC18F2620

I'm trying to get started with C programming on either one of the PIC
microcontrollers in MPLAB IDE using C18 compiler (or any other C
compiler that Microchip makes), however, I'm having some trouble
drafting a source code that has, for example, LEDs flashing or display
a "Hello World" message through printf() and in such fashion that I
can see it on a host computer. Does anyone know any good resources in
those tasks that could help me get started?

Stanley

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