Help Version 19.0.2017.10.27
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#include "ltdoc2.h"
L_LTDOC2_API L_INT EXT_FUNCTION L_Doc2SelectZoneByPoint(hDoc, hDC, nPageIndex, pt, pnZoneIndex)
L_HDOC2 hDoc; |
handle to the OCR document |
HDC hDC; |
handle to the target device context |
L_INT nPageIndex; |
page index |
POINT pt; |
specifies the point |
L_INT * pnZoneIndex; |
pointer to be updated |
Draws a selection rectangle around the zone located at the specified point.
Parameter |
Description |
hDoc |
Handle to the OCR document. |
hDC |
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. |
nPageIndex |
Index of the page that contains the zones. This index is zero-based. |
pt |
The X and Y coordinates for a point inside a zone. |
pnZoneIndex |
Pointer to a variable to be updated with the index of the selected zone. |
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Draws a selection rectangle around the zone that contains the specified point.
This function will return the selected zone index if it finds a zone that contains the specified point.
To draw a page, call the L_Doc2DrawPage function.
Required DLLs and Libraries
LTDOC2 For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
L_INT Doc2SelectZoneByPointExample(L_HDOC2 hDoc, HWND hWnd){L_INT nRet;HDC hdc = GetDC(hWnd);L_INT nSelZone = 0;POINT pt;pt.x = 450;pt.y = 400;nRet = L_Doc2SelectZoneByPoint(hDoc, hdc, 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);}elsereturn nRet;ReleaseDC(hWnd, hdc);return SUCCESS;}