References ▼
typedef struct _LTWAINPROPERTIES{L_UINT uStructSize;L_BOOL bPaperSource;L_INT nMaxNumOfPages;L_INT nDuplexScanning;IMAGERESOLUTION ImageRes;DATATRANSFER DataTransfer;IMAGEEFFECTS ImageEff;} LTWAINPROPERTIES, * pLTWAINPROPERTIES;
The LTWAINPROPERTIES structure provides information about the available TWAIN properties.
| Member | Description | |
| uStructSize | Size of the LTWAINPROPERTIES structure, in bytes, for versioning. Use the sizeof() macro to calculate the value. | |
| bPaperSource | Flag that indicates whether to use the Auto - Feed capability of the selected TWAIN source. Possible values are: | |
| Value | Meaning | |
| TRUE | Use the Auto - Feed capability. | |
| FALSE | Do not use the Auto - Feed capability. | |
| nMaxNumOfPages | The maximum number of pages to get from the TWAIN source. (If the function updates this field to -1, it means that the number of pages is unlimited.) | |
| nDuplexScanning | Sets the type of duplex scanning. Possible values are (according to the TWAIN 1.9 specification): | |
| Value | Meaning | |
| TWDX_NONE | No duplex used. | |
| TWDX_1PASSDUPLEX | 1 pass duplex. | |
| TWDX_2PASSDUPLEX | 2 pass duplex. | |
| ImageRes | A structure of type IMAGERESOLUTION that contains image resolution data for the TWAIN source. | |
| DataTransfer | A structure of type DATATRANSFER that contains data transfer information for the TWAIN source. | |
| ImageEff | A structure of type IMAGEEFFECTS that contains image effects information for the TWAIN source. | |
pLTWAINPROPERTIES is a pointer to a LTWAINPROPERTIES structure. Where the function parameter type is pLTWAINPROPERTIES, you can declare an LTWAINPROPERTIES variable, update the structure's fields, and pass the variable's address in the parameter. Declaring a pLTWAINPROPERTIES variable is necessary only if your program requires a pointer.
LTWAINPROPERTIES is used with the LTwain::GetProperties and LTwain::SetProperties functions.