Variable Name
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Description
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Notes
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CV_BREAK
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This variable can be used to enable/disable the user's ability to interrupt execution by Control-Break. Pressing the Control-Break key can be used to break out of a program only if this variable is on.
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CV_COMMANDS
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This variable controls the display of commands. Commands will be displayed only if this variable is on.
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CV_DEFER_PAINTING
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This variable controls drawing repaint procedure: normally SilverScreen draws to the refresh buffer, and then updates to the screen buffer at the end of repaint (default value of 1). This variable allows the default behavior to change, providing more or less immediate screen update visibility.
Possible Values
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Repaint Procedure
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0
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Paint to screen and to refresh buffer at the same time.
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1
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Paint to refresh buffer, then at the end of repaint, update screen via BitBlt (this is the default value)
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2
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Paint to refresh buffer, but update to screen via BitBlt every 0.25 seconds.
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CV_DISPATCH_SYSCHAR
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This variable controls whether the SilverScreen input system allows Windows system keys (WM_SYSCHAR) to be passed back to SilverScreen apllications via inchar/nextkey. A value of 0 means that system keys are returned to the inchar caller, otherwise they are passed through to MFC for default handling. The default value is 0.
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CV_ENABLE_CLOSE
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This variable enables or disables the System window close button on the SilverScreen frame window. The window close button will be displayed if the variable is non-zero, and will not be displayed if the variable is set to zero.
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CV_ENABLE_DLL_IDLE_PROCESSING
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This variable whether SilverScreen calls idle processing in its own frame idle routine, when the CWinApp-derived class returned via AfxGetApp is not SilverScreen (i.e. is a DLL). The default value is 1, which means that DLL idle processing is enabled.
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CV_ERRORS
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This variable controls the display of command error messages. These messages will be displayed only if this variable is on. This variable can be used in combination with the predefined variable ss_errno and the function error_text to intercept SilverScreen error messages.
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CV_FILL_ENABLED
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cv_get(CV_FILL_ENABLED) returns 1 if fill is currently enabled, and otherwise 0.
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read only
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CV_GRID
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cv_get(CV_GRID) returns 1 if the grid is currently enabled, and otherwise 0.
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read only
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CV_ICON_AREA_WIDTH
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This variable controls the pixel width of the icon area used in the icon and icon2 functions.
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CV_JUMP_MENU
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This variable controls the availabity of the popup Jump Menu when picking point. If this variable is set to 0, the Jump Menu will not be available.
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CV_MESSAGES
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This variable controls the display of messages that appear at the bottom of the screen. (i.e., "Printing ...", "Sweeping ...") These messages will be displayed only if this variable is on.
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CV_MODIFIED
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cv_get(CV_MODIFIED) returns 1 if the current drawing is modified, and otherwise 0.
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read only
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CV_NOTATION
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cv_get(CV_NOTATION) returns a number corresponding to the current setting for notation
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CV_NOTES
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If this variable is on, then NOTE and the WAIT commands will be handled normally. If the variable is off, these commands will be ignored.
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CV_ORTHO_SNAP
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cv_get(CV_ORTHO) returns 1 if ortho-snap is currently enabled, and otherwise 0.
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read only
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CV_PAINT_ONE_WINDOW
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This variable controls the ability of the program to force repainting to occur in only the current window or in all windows.
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CV_PASSTHROUGH_CMDUI_ENABLE
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This variable determines whether SilverScreen will pass down ON_UPDATE_COMMAND_UI notifications to the DLL via the SilverScreen-defined message WM_CMDUI_ENABLE message. If set to 1, the update command UI messages are relayed to the DLL, otherwise, they are enabled automatically. The default is 0. This is documented more fully in the WinSmith manual.
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CV_PATTERNS_ENABLED
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cv_get(CV_PATTERNS_ENABLED) returns 1 if patterns are currently enabled, and otherwise 0.
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read only
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CV_QUICK_MENU
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When selecting points, entities or primitives, the CTRL-LEFT event will normally allow the user to change the view. This will be disallowed if this variable is set to 0.
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CV_REDRAW_LOCAL
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When the SilverScreen window is resized, SilverScreen will normally redraw the contents of the drawing windows. This automatic redraw can be disabled by setting CV_REDRAW_LOCAL to 0. When this is done, a refresh event (C_REDRAW or C_RESIZE) notifies that a resize has occurred.
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CV_REFRESH
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This variable controls display of the graphic area of the screen. If this variable is on, then the results of SilverScreen commands will be displayed on the screen; otherwise they will not. cv_set(CV_REFRESH, 1) is functionally equivalent to the SilverScreen command REFRESH ENABLE. cv_set(CV_REFRESH,0) is equivalent to REFRESH OFF.
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CV_RESIZE_PERMITTED
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This variable by be used to permit/disallow the resizing of the SilverScreen window. Only when the variable has the value 1 will the user will be able to alter the window’s size.
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CV_REUSE_ICON
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This variable controls the clearing of the icon area after icon prompting. It is useful to reduce screen updates when the same icon is used repeatedly. By setting this variable to 1, the icon area will not be cleared after the prompting has occurred
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CV_SINGLE_STEP
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This is a debugging variable that can be used to halt execution whenever a command is executed. If this variable is on, commands will be displayed and the system will await a key from the keyboard.
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CV_SNAP
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cv_get(CV_SNAP) returns 1 if snap is currently enabled, and otherwise 0.
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read only
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CV_TRACE_INFO
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This variable controls the display of the trace information in the XYZ status area. This information appears during interactive drawing and when points and displacements are being marked. If the variable is on, and if the XYZ status area is visible, then the information is displayed; otherwise it is not.
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CV_UNITS
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cv_get(CV_UNITS) returns a number corresponding to the current setting for units of measure
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read only
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CV_VERY_QUIET
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This is a composite variable that simultaneously sets CV_COMMANDS and CV_MESSAGES .
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CV_WINDOW_BORDER
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This variable controls the border color that is used for the current window. If the variable is on, the current window is displayed using the color white; otherwise the normal window color is used.
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