L_ILM_DRAWITEM
Send this message to draw/paint the specified item in the ImageList Control's parent window.
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Parameter |
Description |
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wParam |
0-not used. |
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lParam |
Pointer to an LILDRAWITEM structure that contains information about the item to be drawn/painted. |
Returns
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ERROR_USER_ABORT |
The ImageList Control will not do any further drawing/painting of the specified item. |
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<> ERROR_USER_ABORT |
The ImageList Control will draw/paint the item normally. |
Comments
The LILDRAWITEM structure pointed to by lParam specifies the information to draw/paint.
The user is responsible for any objects created during the processing of this message. In addition, the user is also responsible for returning the HDC to its original state before returning from the processing of this message.
See Also
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Elements: |
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Topics: |
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Example
this function processes all the messages for a window
//L_INT32 MainWndProc(HWND hWnd, L_UINT Message, WPARAM wParam,LPARAM lParam)
//{
// pLILDRAWITEM pdi=NULL;
//
// switch (Message)
// {
// case ILM_DRAWITEM:
// pdi=(pLILDRAWITEM)lParam;
// if(pdi)
// {
// if(pdi->pItem)
// {
// HRGN hRgn1=NULL;
// HRGN hRgn2=NULL;
// HBRUSH hBrush=NULL;
// RECT rcMyItem;
// SaveDC(pdi->hDC);
// CopyRect(&rcMyItem, &pdi->rcItem);
// InflateRect(&rcMyItem, -10, -10);
// hRgn1 = CreateEllipticRgn(pdi->rcItemBack.left,
// pdi->rcItemBack.top,
// pdi->rcItemBack.right,
// pdi->rcItemBack.bottom);
// hRgn2 = CreateEllipticRgn(rcMyItem.left,
// rcMyItem.top,
// rcMyItem.right,
// rcMyItem.bottom);
// if(pdi->pItem->bSelected)
// hBrush=(HBRUSH)GetStockObject(WHITE_BRUSH);
// else
// hBrush=(HBRUSH)GetStockObject(BLACK_BRUSH);
// SelectObject(pdi->hDC, hBrush);
// SelectObject(pdi->hDC, hRgn1);
// Rectangle(pdi->hDC, pdi->rcItemBack.left,
// pdi->rcItemBack.top,
// pdi->rcItemBack.right,
// pdi->rcItemBack.bottom);
// SelectObject(pdi->hDC, hRgn2);
// L_PaintDC(pdi->hDC, pdi->pItem->pBitmap,
// NULL, NULL, &rcMyItem, NULL, SRCCOPY);
// if(pdi->pItem->pText && lstrlen(pdi->pItem->pText))
// DrawText(pdi->hDC, pdi->pItem->pText,
// lstrlen(pdi->pItem->pText), &rcMyItem,
// DT_SINGLELINE|DT_BOTTOM|DT_END_ELLIPSIS);
// DeleteObject(hRgn1);
// DeleteObject(hRgn2);
// RestoreDC(pdi->hDC, -1);
// return ERROR_USER_ABORT;//I did the drawing
// }
// }
// //I did not do the drawing
// //other cases here...............
// //for other window messages......
// }
// return DefWindowProc(hWnd, Message, wParam, lParam);
// return SUCCESS;
//}