'\"
'\" Copyright (c) 1999 Scriptics Corporation
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\" 
'\" RCS: @(#) $Id: GetVersion.3,v 1.4 2004/10/07 14:44:32 dkf Exp $
'\" 
.so man.macros
.TH Tcl_GetVersion 3 7.5 Tcl "Tcl Library Procedures"
.BS
.SH NAME
Tcl_GetVersion \- get the version of the library at runtime
.SH SYNOPSIS
.nf
\fB#include <tcl.h>\fR
.sp
\fBTcl_GetVersion\fR(\fImajor, minor, patchLevel, type\fR)
.SH ARGUMENTS
.AS Tcl_ReleaseType *patchLevel out
.AP int *major out
Major version number of the Tcl library.
.AP int *minor out
Minor version number of the Tcl library.
.AP int *patchLevel out
The patch level of the Tcl library (or alpha or beta number).
.AP Tcl_ReleaseType *type out
The type of release, also indicates the type of patch level. Can be
one of \fBTCL_ALPHA_RELEASE\fR, \fBTCL_BETA_RELEASE\fR, or 
\fBTCL_FINAL_RELEASE\fR.
.BE

.SH DESCRIPTION
.PP
\fBTcl_GetVersion\fR should be used to query the version number
of the Tcl library at runtime.  This is useful when using a 
dynamically loaded Tcl library or when writing a stubs-aware
extension.  For instance, if you write an extension that is
linked against the Tcl stubs library, it could be loaded into
a program linked to an older version of Tcl than you expected.
Use \fBTcl_GetVersion\fR to verify that fact, and possibly to
change the behavior of your extension.
.PP
\fBTcl_GetVersion\fR accepts NULL for any of the arguments. For instance if 
you do not care about the \fIpatchLevel\fR of the library, pass
a NULL for the \fIpatchLevel\fR argument.

.SH KEYWORDS
version, patchlevel, major, minor, alpha, beta, release