The Control Mode routine controls the mode of the pasteboard. This includes buffering, minimal updating, whether the screen is cleared when the pasteboard is deleted, and whether tab characters are used for screen formatting. Format SMG$CONTROL_MODE pasteboard-id [,new-mode] [,old-mode] [,buffer-size]
1 – Returns
OpenVMS usage:cond_value type: longword (unsigned) access: write only mechanism: by value
2 – Arguments
pasteboard-id OpenVMS usage:identifier type: longword (unsigned) access: read only mechanism: by reference Specifies the pasteboard to be changed. The pasteboard-id argument is the address of an unsigned longword that contains the pasteboard identifier. The pasteboard identifier is returned by SMG$CREATE_PASTEBOARD. new-mode OpenVMS usage:mask_longword type: longword (unsigned) access: read only mechanism: by reference Specifies the new control settings to be used. The optional new-mode argument is the address of an unsigned longword that contains the mode settings. A bit set to 1 forces that mode to be employed; a bit set to 0 inhibits that mode of operation. Valid settings are as follows: SMG$M_BUF_ENABLED Enables buffering. SMG$M_CLEAR_ Causes the Screen Management Facility to clear SCREEN the screen when the program exits if you have not previously deleted the pasteboard. SMG$M_IGNORE Allows you to delete the pasteboard even if batching is in effect. SMG$M_MINUPD Enables minimal update (the default). SMG$M_NOTABS Causes the Screen Management Facility not to use tab characters to format the screen. SMG$M_PROTECT Protect pasteboard operations from AST interrupts (the default). SMG$M_RELEASE_PBD Allows you to change the pasteboard size (using the SMG$CHANGE_PBD_CHARACTERISTICS routine) and prevents the Screen Management Facility from modifying anything on the screen outside of the smaller pasteboard. All other bits must be 0 and are reserved for future use by Compaq. old-mode OpenVMS usage:mask_longword type: longword (unsigned) access: write only mechanism: by reference Receives the control settings that were in effect before calling this procedure. The optional old-mode argument is the address of an unsigned longword into which the former mode settings are written. A bit set to 1 indicates that the specified mode was employed; a bit set to 0 indicates that the mode was inhibited. buffer-size OpenVMS usage:word_unsigned type: word (unsigned) access: read only mechanism: by reference Specifies the size of the buffer in bytes. The optional buffer- size argument is the address of an unsigned word that contains the size of the buffer. The buffer-size argument is used when buffering mode is enabled (SMG$M_BUF_ENABLED). The default and minimum buffer size is 256 bytes. The maximum value is 65535. The buffer-size value depends on user authorization file (UAF) values and is maximized with the SYSGEN parameter MAXBUF.