Declaration: 
int getenv(char name[], char dest[]); 
Description 
Obtains the value of the name environment variable. The name should be in the upper case and should not end with the equal sign (=). The variable value is copied to dest. 
Returned value 
1, if the specified variable is found; and 0 otherwise. 
Example 
char value[MAXPATH]; 
getenv("COMSPEC", value); 
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