Displaying a Picture and Storing It in an Enhanced Metafile

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This section contains an example demonstrating the creation of a picture and the process of storing the corresponding records in a metafile. The example draws a picture to the display or stores it in a metafile. If a display DC handle is given, it draws a picture to the screen using various GDI functions. If an enhanced metafile DC is given, it stores the same picture in the enhanced metafile.

oid DrawOrStore(HWND hwnd, HDC hdcMeta, HDC hdcDisplay)

{

RECT rect;

HDC hDC;

int fnMapModeOld;

HBRUSH hbrOld;

/* Draw it to the display DC or store it in the metafile DC. */

if (hdcMeta)

hDC = hdcMeta;

else

hDC = hdcDisplay;

/* Set the mapping mode in the DC. */

fnMapModeOld = SetMapMode(hDC, MM_LOENGLISH);

/* Find the midpoint of the client area. */

GetClientRect(hwnd, (LPRECT)&rect);

DPtoLP(hDC, (LPPOINT)&rect, 2);

/* Select a gray brush. */

hbrOld = SelectObject(hDC, GetStockObject(GRAY_BRUSH));

/* Draw a circle with a one inch raduis. */

Ellipse(hDC, (rect.right/2 - 100), (rect.bottom/2 + 100),

(rect.right/2 + 100), (rect.bottom/2 - 100));

/* Perform additional drawing here. */

/* Set the device context back to its original state. */

SetMapMode(hDC, fnMapModeOld);

SelectObject(hDC, hbrOld);

}

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