hi
Pelles C has some nice "wizards" that help to create a "hello world" window.
Start Pelles C, choose create Project, create Win32 application, choose "hello world".
Compile it by pressing "Execute" button.
Study the code to check what is allready there.
Google and try implement the features you miss..
...for example "Winapi Mouse click"..
..and post your project here incase there are problems.
Have fun and good luck