# KVXMLSetStyleSheet()

This function is called directly and is used to specify the full path and file name of an external Style Sheet (XSL or CSS).

## Syntax

    BOOL pascal KVXMLSetStyleSheet(
        void    *pContext,
        char    *pszStyleSheetName,
        char    *pszRef);

## Arguments

`pContext` | A pointer returned from fpInit() or fpInitWithLicenseData().
`pszStyleSheetName` | A pointer to the full path and file name of the style sheet.
`pszUrlRef` | A pointer to the URL or file name of style sheet.

## Returns

- If the call is successful, the return value is `TRUE`.

- If this call is unsuccessful, the return value is `FALSE`.

## Discussion

- When the value for `eStyleSheetType` in `KVXMLOptions` is set to `XML_XSL` or `XML_CSS`, an external style sheet is referenced by a processing instruction of the form:

  `<?xml-stylesheet href="pszRef" type="text/xsl"?>`

  or

      <?xml-stylesheet href="pszRef" type="text/css"?>

- If the value for `pszStyleSheetName` includes the output directory, the `href` only consists of the file name since the XML output resides in the same directory as the style sheet file.

- If the value for `pszStyleSheetName` points to a directory other than the output directory, the `href` consists of the full path and file name.

- Style sheet information cannot be written to an external `XSL` file. XML Export can only reference an existing XSL style sheet.

- When `XML_CSS` is specified, a CSS file can be created based on `pszStyleSheetName`.

- If the name of the CSS is not specified by using this function, a CSS style file is created with an automatically-generated file name.

- If this function is used to specify the name of the style file, that file is referenced in the processing instruction.

  - If the CSS file does not exist in the specified location, it is created.

  - If it exists, but is empty, CSS styles are written to it.

  - If the CSS file exists and is not empty, the file is not altered. There is no attempt made to validate the file.

- If there are multiple calls made to `fpConvertStream()` or `KVXMLConvertFile()`, and the name of the style sheet has been set with `KVXMLSetStyleSheet`, the file name can be disabled by calling `KVXMLSetStyleSheet` again with the `pszStyleSheetName` and `pszRef` set to `NULL`. The file name can then be set to a different value by calling `KVXMLSetStyleSheet` with the new file name prior to the next call to `fpConvertStream()` or `KVXMLConvertFile()`.

- This function runs in-process or out of process. See Convert Files Out of Process.

- When converting out of process, this function must be called after the call to `KVXMLStartOOPSession()` and before the call to `KVXMLEndOOPSession()`. See KVXMLStartOOPSession() and KVXMLEndOOPSession().

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