LTWAINPROPERTIES
typedef struct _LTWAINPROPERTIES
{
L_UINT uStructSize;
L_BOOL bPaperSource;
L_INT nMaxNumOfPages;
L_INT nDuplexScanning;
IMAGERESOLUTION ImageRes;
DATATRANSFER DataTransfer;
IMAGEEFFECTS ImageEff;
} LTWAINPROPERTIES, L_FAR * 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. |
Comments
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.