References ▼
#include "LtPnt.h"
L_LTPNT_API L_INT L_PntIsValid(pPaint)
pPAINTHANDLE pPaint; |
pointer to a paint handle |
Determines the validity of the given paint handle.
Parameter |
Description |
pPaint |
Pointer to a paint handle. |
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
The paint handle will be valid after calling L_PntInit, and will remain valid until L_PntFree is called.
Required DLLs and Libraries
LTPNT For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application |
Functions: |
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Topics: |
DigitalPaint Functions: Initializing and Freeing the Paint Handle |
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This example shows how to use the L_PntIsValid function.
L_INT PntIsValidExample(HWND hWnd,pPAINTHANDLE pPaint){L_INT nRet;/* Initiate the Paint toolkit */nRet = L_PntInit ( &pPaint );if ( SUCCESS != nRet){return nRet;}nRet = L_PntIsValid ( pPaint );if ( SUCCESS == nRet ){HDC hDC;RECT rcShape;/* Get the device context */hDC = GetDC ( hWnd ) ;/* Set the coordinates with respect to the DC dimensions */SetRect ( &rcShape, 10, 10, 150, 150 ) ;/* Set the DC Extents */RECT rcClient;GetClientRect(hWnd, &rcClient);nRet = L_PntSetDCExtents ( pPaint, &rcClient );/* Use the current shape properties to draw an ellipse to DC (hDC) */nRet = L_PntDrawShapeEllipse ( pPaint, hDC, &rcShape ) ;if(nRet != SUCCESS)return nRet;/* Release the device context */ReleaseDC ( hWnd, hDC ) ;}else{MessageBox ( hWnd, TEXT("Invalid PAINTHANDLE"), TEXT("Error"), MB_OK ) ;return nRet;}return SUCCESS ;}