#include "ltdoc2.h"
L_LTDOC2_API L_INT L_Doc2SelectZoneByPointExt(hDoc, hDC, nDocId, nPageIndex, pt, pnZoneIndex)
Draws a selection rectangle around the zone located at the specified point.
Handle to the OCR document.
Document ID created by calling L_Doc2CreateDocument.
Handle to a device context, such as a screen, to use as the display surface. The mapping mode of the device context must be MM_TEXT.
Zero-based index of the page that contains the zones.
The X and Y coordinates for a point inside a zone.
Pointer to a variable to be updated with the index of the selected zone.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
This function returns the selected zone index if it finds a zone that contains the specified point.
To draw a page, call the L_Doc2DrawPage / L_Doc2DrawPageExt function.
Required DLLs and Libraries
L_INT Doc2SelectZoneByPointExampleExt(L_HDOC2 hDoc, L_INT nDocId, HWND hWnd)
{
L_INT nRet;
HDC hdc = GetDC(hWnd);
L_INT nSelZone = 0;
POINT pt;
pt.x = 450;
pt.y = 400;
nRet = L_Doc2SelectZoneByPointExt(hDoc, hdc, nDocId, 0, pt, &nSelZone);
if (nRet == SUCCESS)
{
L_TCHAR szBuffer[200];
ZeroMemory(szBuffer, sizeof(szBuffer));
wsprintf(szBuffer, TEXT("The selected zone index = %d\n"), nSelZone);
MessageBox(NULL, szBuffer, TEXT("Notice!"), MB_OK);
}
else
return nRet;
ReleaseDC(hWnd, hdc);
return SUCCESS;
}