References ▼
typedef struct _LWIACAPABILITY{L_UINT uStructSize;L_UINT uPropertyID;L_TCHAR szPropertyName[MAX_PATH];L_UINT uVariableType;L_UINT uPropertyAttributes;pLWIACAPABILITYVALUES pCapabilityValues;} LWIACAPABILITY, * pLWIACAPABILITY;
The LWIACAPABILITY structure provides information about each enumerated WIA capability.
| Member | Description | |
| uStructSize | Size of this structure in bytes, for versioning. Use the sizeof() macro to calculate this value. | |
| uPropertyID | The enumerated property ID. | |
| szPropertyName | The name of the enumerated property. | |
| uVariableType | The type of the enumerated property the user can use when do the casting for the received property value. | |
| uPropertyAttributes | The enumerated property attributes like the property value type (Flag value, List value or Range value), the property access (Read, Write, Read/Write), The following constants are valid property attributes: | |
| Value | Meaning | |
| WIA_PROP_CACHEABLE | The device can cache the property's value. | |
| WIA_PROP_FLAG | The property has a list of legal flag values. Flag values are combined using a bitwise OR operation. | |
| WIA_PROP_LIST | The property has a list of legal values. | |
| WIA_PROP_NONE | The property does not have any valid values associated with it. | |
| WIA_PROP_RANGE | The property has a range of valid values. | |
| WIA_PROP_READ | The application can read the property's value. | |
| WIA_PROP_RW | The application can read and write the property's value. | |
| WIA_PROP_WRITE | The application can write the property's value. | |
| pCapabilityValues | Pointer to the values structure that contains the enumerated capability values. | |
This feature is available in LEADTOOLS version 16 or higher.
pLWIACAPABILITY is a pointer to an LWIACAPABILITY structure. If the function parameter type is LWIACAPABILITY, you can declare an LWIACAPABILITY variable, update the structure's fields, and pass the variable's address in the parameter. Declaring a pLWIACAPABILITY variable is necessary only if your program requires a pointer.
LWIACAPABILITY is used with the LWia::EnumCapabilities function.