The WM_PSD_ENVSTAMPRECT message notifies the hook procedure of a Page Setup dialog box that the dialog box is about to draw the envelope-stamp rectangle of the sample page.
WM_PSD_ENVSTAMPRECT
hDC = (WPARAM) (HDC) wParam; // handle of the device context
lprcEnvStamp = (LPARAM) (LPRECT) lParam; // envelope-stamp rectangle
Parameters
hDC
Value of wParam. Identifies the device context for the sample page.
lprcMargin
Value of lParam. Pointer to a RECT structure that contains the coordinates, in pixels, of the envelope-stamp rectangle.
Return Values
If the hook procedure returns TRUE, the dialog box does not draw the envelope-stamp portion of the sample page.
If the hook procedure returns FALSE, the dialog box draws the envelope-stamp portion of the sample page.
Remarks
The Page Setup dialog box includes an image of a sample page that shows how the user's selections affect the appearance of the printed output. When you call the PageSetupDlg function, you can provide a PagePaintHook hook procedure to customize the appearance of the sample page. Whenever the dialog box is about to draw the contents of the sample page, the dialog box sends a sequence of WM_PSD* messages to the hook procedure.
A hook procedure receives this message only if the selected paper type is an envelope.
See Also