Cancels the install, stops execution of script, and displays user_message in the status display. Note: you can use this from \R{callbacks}{Callback functions} to do special things. \R{pages}{Page callbacks} also uses \R{abort}{Abort} for special purposes.
Calls the function named \e{function_name}, the label named \e{label_name}, or a variable that specifies an address. An address is returned by \R{getcurrentaddress}{GetCurrentAddress}, \R{getfunctionaddress}{GetFunctionAddress} or \R{getlabeladdress}{GetLabelAddress}. A call returns when it encounters a \R{return}{Return} instruction. Sections and functions are automatically ended with a \R{return}{Return} instruction. Uninstall functions cannot be called from installer functions and sections, and vice-versa.
Gets the address of the current instruction (the \R{getcurrentaddress}{GetCurrentAddress}) and stores it in the output user variable. This user variable then can be passed to \R{call}{Call} or \R{goto}{Goto}.
Gets the address of the function and stores it in the output user variable. This user variable then can be passed to \R{call}{Call} or \R{goto}{Goto}. Note that if you \R{goto}{Goto} an address which is the output of \R{getfunctionaddress}{GetFunctionAddress}, your function will never be returned to (when the function you Goto'd to returns, you return instantly).
Gets the address of the label and stores it in the output user variable. This user variable then can be passed to \R{call}{Call} or \R{goto}{Goto}. Note that you may only call this with labels accessible from your function, but you can call it from anywhere (which is potentially dangerous). Note that if you \R{call}{Call} the output of \R{getlabeladdress}{GetLabelAddress}, code will be executed until it Return's (explicitly or implicitly at the end of a function), and then you will be returned to the statement after the \R{call}{Call}.
If +offset or -offset is specified, jump is relative by offset instructions. Goto +1 goes to the next instruction, Goto -1 goes to the previous instruction, etc.
If a user variable is specified, jumps to absolute address (generally you will want to get this value from a function like \R{getlabeladdress}{GetLabelAddress}). Compiler flag commands and \R{ssectionin}{SectionIn} aren't instructions so jumping over them has no effect.
If abort is called it will "return" true. This can happen if the user chose abort on a file that failed to create (or overwrite) or if the user aborted by hand. This function can only be called from the leave function of the instfiles \R{page}{page}.
Checks and clears the error flag, and if it is set, it will goto jumpto_iferror, otherwise it will goto jumpto_ifnoerror. The error flag is set by other instructions when a recoverable error (such as trying to delete a file that is in use) occurs.
Checks for existence of file(s) file_to_check_for (which can be a wildcard, or a directory), and Gotos jump_if_present if the file exists, otherwise Gotos jump_otherwise. If you want to check to see if a file is a directory, use \R{iffileexists}{IfFileExists} DIRECTORY\\*.*
Checks the reboot flag, and jumps to jump_if_set if the reboot flag is set, otherwise jumps to jump_if_not_set. The reboot flag can be set by \R{delete}{Delete} and \R{rename}{Rename}, or manually with \R{setrebootflag}{SetRebootFlag}.
Checks the silent flag, and jumps to jump_if_silent if the installer is silent, otherwise jumps to jump_if_not. The silent flag can be set by \R{asilentinstall}{SilentInstall}, \R{asilentuninstall}{SilentUninstall}, \R{setsilent}{SetSilent} and by the user passing /S on the command line.
Compares two integers val1 and val2. If val1 and val2 are equal, Gotos jump_if_equal, otherwise if val1 < val2, Gotos jump_if_val1_less, otherwise if val1 > val2, Gotos jump_if_val1_more.
Compares two unsigned integers val1 and val2. If val1 and val2 are equal, Gotos jump_if_equal, otherwise if val1 < val2, Gotos jump_if_val1_less, otherwise if val1 > val2, Gotos jump_if_val1_more. Performs the comparison as unsigned integers.
Displays a \R{messagebox}{MessageBox} containing the text "messagebox_text". mb_option_list must be one or more of the following, delimited by |s (e.g. MB_YESNO|MB_ICONSTOP).
Use the /SD parameter with one of the return_check values above to specify the option that will be used when the installer is silent. See \k{silent} for more information.
Causes the installer to exit as soon as possible. After \R{quit}{Quit} is called, the installer will exit (no callback functions will get a chance to run).
