1)Download the English version of the pdf from the link below. Explanation is very intuitive in this.
winprog . org / tutorial /
2)Also this link too have good tutorial for Win32 API
relisoft . com / win32 / index . htm
3) Read this book it's covers too much, But only if you have patience
Programming Windows API 5th -Charles Petzold
Finally if you explore msdn for detail explanation for every API you are using.
Please remove spaces for the url mentioned