function expands environment-variable strings and replaces them with their
| LPCTSTR lpSrc,
||// pointer to string with environment variables
| LPTSTR lpDst,
||// pointer to string with expanded environment variables
| DWORD nSize
||// maximum characters in expanded string
Points to a null-terminated string that might contain references to
environment-variable strings of the form:
For each such reference, the %variableName%
portion is replaced with the current value of that environment variable.
The replacement rules are the same as those used by the command interpreter.
Case is ignored when looking up the environment-variable name. If the name is
not found, the %variableName%
portion is left undisturbed.
Points to a buffer to receive a copy of the source buffer, after all
environment-variable name substitutions have been performed.
Specifies the maximum number of characters that can be stored in the buffer
pointed to by the lpDst
parameter, including the terminating null character.
If the function succeeds, the return value is the number of characters stored
in the destination buffer. If the number of characters is greater than the size
of the destination buffer, the return value is the size of the buffer required
to hold the expanded strings.
If the function fails, the return value is zero. To get extended error
information, call GetLastError
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