lpbData

Points to a buffer of size cbAvailable that has the data sent by the client.

lpszContentType
Null-terminated string containing the content type of the data sent by the client. This is equivalent to the CGI variable CONTENT_TYPE.

GetServerVariable
This function copies information (including CGI variables) relating to an HTTP connection, or to the server itself, into a buffer. GetServerVariable takes the following parameters:

hConn A handle to a connection.

lpszVariableName Null-terminated string indicating which variable is being requested. Variable names are:Variable Name Description
ALL_HTTP All HTTP headers that were not already parsed into one of the above variables. These variables are of the form HTTP_

.
AUTH_PASS This will retrieve the password corresponding to REMOTE_USER as supplied by the client. It will be a null-terminated string.
AUTH_TYPE Contains the type of authentication used. For example, if Basic authentication is used, the string will be "Basic". For Windows NT Challenge-response, it will be "NTLM". Other authentication schemes will have other strings. Because new authentication types can be added to Internet Server, it is not possible to list all possible strings. If the string is empty then no authentication is used.
CONTENT_LENGTH The number of bytes which the script can expect to receive from the client.
CONTENT_TYPE The content type of the information supplied in the body of a POST request.
GATEWAY_INTERFACE The revision of the CGI specification to which this server complies. The current version is CGI/1.1.
HTTP_ACCEPT Special case HTTP header. Values of the Accept: fields are concatenated, separated by ", ". For example, if the following lines are part of the HTTP header:
accept: */*; q=0.1
accept: text/html
accept: image/jpeg