Help with PHP extension compilation

Good Day all,
I need some help. Im trying to compile a .dll for php based on pdflib-lite source.

Basically I put the pdflib-lit source into php4.4.0's source tree. Then I compile the dll. I get an error indicating that MSVC cant find 'php5ts.lib'.
I think somthing fishey is happening here as It is my understanding that php5ts.lib is a library associated with php5.x.x. Why would MSVC be looking for this library? Any suggestions?

Thnx

Probably because your DLL requires PHP 5.

Try linking to the librar(y|ies) that MSVC can't find.