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Internationalizing Applications
Using Multi-byte Code Pages : Issues specific to multi-byte code pages : Valid and invalid code-page conversions
 

Valid and invalid code-page conversions

Sometimes you can convert data from one code page to another and sometimes you cannot. Understanding Code Pages discusses a general rule, based on elementary set theory, that explains why some code-page conversions are valid and others are not. In the following restatement of the rule, source code page means the code page you are converting from and target code page means the code page you are converting to.
* Determining valid code-page conversions (for non-Unicode databases)
* Converting between double byte and single byte
* Converting from double byte to double byte