With Control Spy, you can see instantly how different styles affect the behavior and appearance of each control, and also how you can change the state of each control by sending messages.
Two versions of Control Spy are available, one for Comctl32.dll version 5.x and one for Comctl32.dll version 6.0 and later. ControlSpyV6.exe has an application manifest built in so that it uses the newer, themed controls, whereas ControlSpyV5.exe does not and therefore defaults to the older version.

System Requirements
• Supported Operating Systems: Windows XP; Windows XP 64-bit; Windows XP Embedded; Windows XP Embedded Service Pack 1; Windows XP Embedded Service Pack 2 ; Windows XP for Itanium-based Systems Version 2003; Windows XP Home Edition ; Windows XP Home Edition N; Windows XP Media Center Edition; Windows XP Professional 64-Bit Edition (Itanium) ; Windows XP Professional 64-Bit Edition (Itanium) 2003; Windows XP Professional Edition ; Windows XP Professional N; Windows XP Service Pack 1; Windows XP Service Pack 2; Windows XP Starter Edition; Windows XP Tablet PC Edition

Download: Control Spy 2.0