You can view a window's properties by right clicking on that window in the tree and selecting "View Properties". A pane will be displayed showing various properties for the selected window.

An example of the Properties dialog.

Generic window properties

Text/Title Displays the text set for the control/window. This is the title for windows and dialog boxes.
Handle The handle (HWND) of the window.
Parent The name and handle of the window's parent. Clicking on this label will highlight that window in the hierarchy tree.
Owner The name and handle of the window's owner, if it has one. Clicking on this label will highlight that window in the hierarchy tree. Only an overlapped or pop-up window (e.g. dialog) can be owned or have an owner.
Dimensions The window's left, top, right, and bottom positions in pixels.
Position The window's x,y position on the screen. Measured in pixels where 0,0 is the top-left corner of the screen.
Size Width and height in pixels
Relative Dimensions If the window is a child of another window, this displays it's x,y position and size relative to it's parent.
Client Dimensions The dimensions of the 'client' area of the window. This is the area within the title bar and border.
Only applicable to window and dialog box controls.
Style bits The window's combined style bits as an integer, in hexadecimal.
Styles A list of styles applied to the window.
Extended Style bits The window's combined extended style bits as an integer, in hexadecimal.
Extended Styles A list of extended styles applied to the window.
Horizontal Scroll The horizontal scroll bar, if the window has one (or if the window is a scroll bar). The following properties are displayed:
Max Position Minimum scrolling position, in pixels.
Min Position Maximum scrolling position, in pixels.
Current Position Position of the scroll box, in pixels.
Page The page size, in device units. A scroll bar uses this value to determine the appropriate size of the proportional scroll box
Vertical Scroll The vertical scroll bar, if the window has one. Properties are same as above.
Font The font of the window text. The following properties are displayed:
Handle Value of the HFONT handle.
Face name The typeface name of the font.
Weight The weight of the font in the range 0 through 1000. For example, 400 is normal and 700 is bold. If this value is zero, a default weight is used.
Width/Height The average width and height, in logical units, of characters in the font.
Quality The output quality. The output quality defines how carefully the graphics device interface (GDI) must attempt to match the logical-font attributes to those of an actual physical font.
Style Normal, italic, underline or strike-out.
Properties A list of application-defined window properties. Each property consists of a string name and a handle to some data.
Owner Process The filename of the process that created the window.
Owner Process ID The ID of the owner process.
Owner Thread ID The ID of the thread within the owner process which created the window.

Specific window properties

Some system controls such as list boxes and combo boxes will have specific properties. These properties will be shown in a separate tab.

Window class properties

In addition to the window's properties, properties for the window's class are also displayed. These properties include:
Class Name A string name identifying the class.
Atom A value that uniquely identifies the window class.
Style bits The window class's combined style bits as an integer, in hexadecimal.
Styles A list of window class styles. These are used to control the behaviour of all windows of this class.
Class Extra Bytes The number of bytes for extra data for the class.
Window Extra Bytes Number of extra window bytes
Background Brush The brush used to paint the window's background. This is either a system defined constant representing a system colour, or a custom colour. If it is a custom defined colour, the following properties are displayed:
Handle Value of the HBRUSH handle.
Style The style of the brush. This specifies whether the brush is solid, uses a bitmap pattern, a hatch pattern or is hollow.
Colour The colour in which the brush is to be drawn. If the style is the BS_HOLLOW or BS_PATTERN style, colour is ignored.
Hatch Specifies the orientation of the lines used to create the hatch, e.g diagonal, cross, vertical or horizontal.