LTWAINPROPERTYQUERY

typedef struct _LTWAINPROPERTYQUERY 
{ 
   L_UINT uStructSize; 
   L_UINT uType; 
   union 
   { 
      pTW_ONEVALUE pltwOneValue; 
      pTW_RANGE pltwRange; 
      pTW_ENUMERATION pltwEnumeration; 
      pTW_ARRAY pltwArray; 
   }; 
} LTWAINPROPERTYQUERY,  * pLTWAINPROPERTYQUERY; 

The LTWAINPROPERTYQUERY structure provides information about the capability properties.

Members

L_UINT uStructSize

Size of this structure in bytes, for versioning. Use the sizeof() operator to calculate this value.

L_UINT uType

Holds the type of pointer to use from the union. Possible values are (according to the TWAIN specification):

pltwOneValue

Pointer to a TW_ONEVALUE structure.

pltwRange

Pointer to a TW_RANGE structure.

pltwEnumeration

Pointer to a TW_ENUMERATION structure.

pltwArray

Pointer to a TW_ARRAY structure.

Comments

pLTWAINPROPERTYQUERY is a pointer to an LTWAINPROPERTYQUERY structure. Where the function parameter type is pLTWAINPROPERTYQUERY, you can declare an LTWAINPROPERTYQUERY variable, update the structure's fields, and pass the variable's address in the parameter. Declaring a pLTWAINPROPERTYQUERY variable is necessary only if your program requires a pointer.

LTWAINPROPERTIES is allocated by the L_TwainQueryProperty function and freed by L_TwainFreePropQueryStructure function.