GetSystemMetrics

The GetSystemMetrics function retrieves various system metrics and system configuration settings.System metrics are the dimensions (widths and heights) of Windows display elements. All dimensions retrieved by GetSystemMetrics are in pixels.

- nIndex
Specifies the system metric or configuration setting to retrieve. All SM_CX* values are widths. All SM_CY* values are heights. The following values are defined:
SM_ARRANGE
Flags specifying how the system arranged minimized windows. For more information about minimized windows, see the following Remarks section.
SM_CLEANBOOT
Value that specifies how the system was started:
0 Normal boot
1 Fail-safe boot
2 Fail-safe with network boot
Fail-safe boot (also called SafeBoot) bypasses the user’s startup files.
SM_CMOUSEBUTTONS
Number of buttons on mouse, or zero if no mouse is installed.
SM_CXBORDER,
SM_CYBORDER
The width and height, in pixels, of a window border. This is equivalent to the SM_CXEDGE value for windows with the 3-D look.
SM_CXCURSOR,
SM_CYCURSOR
Width and height, in pixels, of a cursor. These are the cursor dimensions supported by the current display driver. The system cannot create cursors of other sizes.
SM_CXDLGFRAME,
SM_CYDLGFRAME
Same as SM_CXFIXEDFRAME and SM_CYFIXEDFRAME.
SM_CXDOUBLECLK,
SM_CYDOUBLECLK
Width and height, in pixels, of the rectangle around the location of a first click in a double-click sequence. The second click must occur within this rectangle for the system to consider the two clicks a double-click. (The two clicks must also occur within a specified time.)
SM_CXDRAG,
SM_CYDRAG
Width and height, in pixels, of a rectangle centered on a drag point to allow for limited movement of the mouse pointer before a drag operation begins. This allows the user to click and release the mouse button easily without unintentionally starting a drag operation.
SM_CXEDGE,
SM_CYEDGE
Dimensions, in pixels, of a 3-D border. These are the 3-D counterparts of SM_CXBORDER and SM_CYBORDER.
SM_CXFIXEDFRAME,
SM_CYFIXEDFRAME
Thickness, in pixels, of the frame around the perimeter of a window that has a caption but is not sizable. SM_CXFIXEDFRAME is the width of the horizontal border and SM_CYFIXEDFRAME is the height of the vertical border.
Same as SM_CXDLGFRAME and SM_CYDLGFRAME.
SM_CXFRAME,
SM_CYFRAME
Same as SM_CXSIZEFRAME and SM_CYSIZEFRAME.
SM_CXFULLSCREEN, SM_CYFULLSCREEN
Width and height of the client area for a full-screen window. To get the coordinates of the portion of the screen not obscured by the tray, call the SystemParametersInfo function with the SPI_GETWORKAREA value.
SM_CXHSCROLL, SM_CYHSCROLL
Width, in pixels, of the arrow bitmap on a horizontal scroll bar; and height, in pixels, of a horizontal scroll bar.
SM_CXHTHUMB
Width, in pixels, of the thumb box in a horizontal scroll bar.
SM_CXICON,
SM_CYICON
The default width and height, in pixels, of an icon. These values are typically 32x32, but can vary depending on the installed display hardware.
The LoadIcon function can only load icons of these dimensions.
SM_CXICONSPACING, SM_CYICONSPACING
Dimensions, in pixels, of a grid cell for items in large icon view. Each item fits into a rectangle of this size when arranged. These values are always greater than or equal to SM_CXICON and SM_CYICON.
SM_CXMAXIMIZED,
SM_CYMAXIMIZED
Default dimensions, in pixels, of a maximized top-level window.
SM_CXMAXTRACK,
SM_CYMAXTRACK
Default maximum dimensions, in pixels, of a window that has a caption and sizing borders. The user cannot drag the window frame to a size larger than these dimensions. A window can override these values by processing the WM_GETMINMAXINFO message.
SM_CXMENUCHECK,
SM_CYMENUCHECK
Dimensions, in pixels, of the default menu check-mark bitmap.
SM_CXMENUSIZE,
SM_CYMENUSIZE
Dimensions, in pixels, of menu bar buttons, such as multiple document (MIDI) child close.
SM_CXMIN,
SM_CYMIN
Minimum width and height, in pixels, of a window.
SM_CXMINIMIZED,
SM_CYMINIMIZED
Dimensions, in pixels, of a normal minimized window.
SM_CXMINSPACING
SM_CYMINSPACING
Dimensions, in pixels, of a grid cell for minimized windows. Each minimized window fits into a rectangle this size when arranged. These values are always greater than or equal to SM_CXMINIMIZED and SM_CYMINIMIZED.
SM_CXMINTRACK, SM_CYMINTRACK
Minimum tracking width and height, in pixels, of a window. The user cannot drag the window frame to a size smaller than these dimensions. A window can override these values by processing the WM_GETMINMAXINFO message.
SM_CXSCREEN,
SM_CYSCREEN
Width and height, in pixels, of the screen.
SM_CXSIZE,
SM_CYSIZE
Width and height, in pixels, of a button in a window's caption or title bar.
SM_CXSIZEFRAME,
SM_CYSIZEFRAME
Thickness, in pixels, of the sizing border around the perimeter of a window that can be resized. SM_CXSIZEFRAME is the width of the horizontal border and SM_CYSIZEFRAME is the height of the vertical border.
Same as SM_CXFRAME and SM_CYFRAME.
SM_CXSMICON,
SM_CYSMICON
Recommended dimensions, in pixels, of a small icon. Small icons typically appear in window captions and in small icon view.
SM_CXSMSIZE
SM_CYSMSIZE
Dimensions, in pixels, of small caption buttons.
SM_CXVSCROLL, SM_CYVSCROLL
Width, in pixels, of a vertical scroll bar; and height, in pixels, of the arrow bitmap on a vertical scroll bar.
SM_CYCAPTION
Height, in pixels, of normal caption area.
SM_CYKANJIWINDOW
For double-byte character set versions of Windows, height, in pixels, of the Kanji window at the bottom of the screen.
SM_CYMENU
Height, in pixels, of single-line menu bar.
SM_CYSMCAPTION
Height, in pixels, of a small caption.
SM_CYVTHUMB
Height , in pixels, of the thumb box in a vertical scroll bar.
SM_DBCSENABLED
TRUE or nonzero if the double-byte character set (DBCS) version of USER.EXE is installed; FALSE, or zero otherwise.
SM_DEBUG
TRUE or nonzero if the debugging version of USER.EXE is installed; FALSE, or zero, otherwise.
SM_MENUDROPALIGNMENT
TRUE, or nonzero if drop-down menus are right-aligned relative to the corresponding menu-bar item; FALSE, or zero if they are left-aligned.
SM_MIDEASTENABLED
TRUE if the system is enabled for Hebrew/Arabic languages.
SM_MOUSEPRESENT
TRUE or nonzero if a mouse is installed; FALSE, or zero, otherwise.
SM_MOUSEWHEELPRESENT
Windows NT only: TRUE or nonzero if a mouse with a wheel is installed; FALSE, or zero, otherwise.
SM_NETWORK
The least significant bit is set if a network is present; otherwise, it is cleared. The other bits are reserved for future use.
SM_PENWINDOWS
TRUE or nonzero if the Microsoft Windows for Pen computing extensions are installed; zero, or FALSE, otherwise.
SM_SECURE
TRUE if security is present, FALSE otherwise.
SM_SHOWSOUNDS
TRUE or nonzero if the user requires an application to present information visually in situations where it would otherwise present the information only in audible form; FALSE, or zero, otherwise.
SM_SLOWMACHINE
TRUE if the computer has a low-end (slow) processor, FALSE otherwise.
SM_SWAPBUTTON
TRUE or nonzero if the meanings of the left and right mouse buttons are swapped; FALSE, or zero, otherwise.