The LTWAINSOURCE structure provides information about the available TWAIN source.
Size of the LTWAINSOURCE structure, in bytes, for versioning. Use the sizeof() operator to calculate the value.
Character string that contains the name of the required TWAIN source.
pLTWAINSOURCE is a pointer to a LTWAINSOURCE structure. Where the function parameter type is pLTWAINSOURCE, you can declare an LTWAINSOURCE variable, update the structure's fields, and pass the variable's address in the parameter. Declaring a pLTWAINSOURCE variable is necessary only if your program requires a pointer.