References ▼
#include "LtPnt.h"
L_LTPNT_API L_INT L_PntIsValid(pPaint)
Determines the validity of the given paint handle.
Pointer to a paint handle.
| Value | Meaning |
|---|---|
| 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
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 ;}