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The SetEnvironmentVariable function sets the value of an environment
variable for the current process.
BOOL SetEnvironmentVariable(
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LPCTSTR lpName,
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// address of environment variable name
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LPCTSTR lpValue
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// address of new value for variable
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);
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Parameters
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lpName
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Points to a null-terminated string that specifies the environment variable
whose value is being set. The operating system creates the environment
variable if it does not exist and lpValue is not NULL.
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lpValue
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Points to a null-terminated string containing the new value of the specified
environment variable. If this parameter is NULL, the variable is deleted from
the current process’s environment.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error
information, call GetLastError.
See Also
GetEnvironmentVariable