xp manifest is probably the first thing u want, well this can be very easily done, the simple way is to open a file in your exe directory, create a new text file, and name it 'yourapp.exe.manifest', paste this code inside,
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
<description>XP Manifest</description>
<dependency>
<dependentAssembly>
<assemblyIdentity
type="win32"
name="Microsoft.Windows.Common-Controls"
version="6.0.0.0"
processorArchitecture="X86"
publicKeyToken="6595b64144ccf1df"
language="*"
/>
</dependentAssembly>
</dependency>
</assembly>
then save and close it, run your app and u shud see xp manifest styled buttons etc...