Check for minimum version of a product
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WSupported on Windows
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USupported on Unix
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VSupported on OpenVMS
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NSupported in Synergy .NET
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xcall U_CHECKVERSION(product, version, minvers)
Arguments
product
The product name to be displayed in the error message if the comparison results in a fatal error. (a)
version
The version of the product in use. (a)
minvers
The minimum version required. (a)
Discussion
U_CHECKVERSION checks version to see if it is at least as high as minvers. If not, a fatal error occurs.
The version and minvers strings are expected to be in the form v[.r][.m], where
- v is the major version number (for example, 9 in 9.3.5)
- r is the major revision number (for example, 3 in 9.3.5)
- m is the minor revision number (for example, 5 in 9.3.5)
For a two-digit value, you can use an uppercase Latin letter: A for 10, B for 11, and so forth. For example, for 10.1.1, you can use A.1.1. If you use an uppercase letter for v, r, or m, make sure it is the only character used for that value.
Examples
The following example compares the current Toolkit version (in version) with the minimum allowed version (MIN_VRSN). If version is less than MIN_VRSN, a fatal error occurs.
xcall u_version(version)
xcall u_checkversion("UI Toolkit", version, MIN_VRSN)
