SftPrintPreview/DLL 2.0 - Print Preview Control for C/C++

SFTPRINTPREVIEWN_STARTPRINTING Notification Code

The SFTPRINTPREVIEWN_STARTPRINTING notification code is sent when the user requests printing of the current contents.

Parameters (WM_COMMAND Message)

wParam

The low-order word contains the Print Preview control's control identifier. The high-order word specifies the notification code SFTPRINTPREVIEWN_STARTPRINTING.

lParam

Window handle of the Print Preview control sending the notification.

Comments

The SFTPRINTPREVIEWN_STARTPRINTING notification code is sent when the user requests printing of the current contents.

The user can initiate printing by clicking on the Print button of the built-in tool bar or by accepting the Print dialog presented by the control's PrintDialog function.

The SFTPRINTPREVIEWN_STARTPRINTING notification is used to invoke the Print function to print the current contents. If the SFTPRINTPREVIEWN_STARTPRINTING notification is not handled by an application, no printing will occur. The C++ class CSftPrintPreview_View automatically handles this notification.

The parent window of the Print Preview control receives the SFTPRINTPREVIEWN_STARTPRINTING notification code through the WM_COMMAND message.

Example

C

LRESULT CALLBACK MainWindowProc(HWND hwndMain, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg) {
        case WM_COMMAND: {
            HWND hwndCtl = (HWND) lParam;
            int id = LOWORD(wParam);
            int code = HIWORD(wParam);
            if (hwndCtl) {
                switch (id) {
                    case IDC_PREVIEW:
                    switch (code) {
                        case SFTPRINTPREVIEWN_STARTPRINTING:
                            SftPrintPreview_Print(hwndCtl, hwndMain);
                            break;
                    }
                    break;
                }
            }
            break;
        }
    }
    return DefWindowProc(hwndMain, uMsg, wParam, lParam);
}

C++

BEGIN_MESSAGE_MAP(CPreviewDialog, CDialog)
    ON_SFTPRINTPREVIEWN_STARTPRINTING(IDC_PREVIEW, OnStartPrinting)
END_MESSAGE_MAP()

afx_msg void CPreviewDialog::OnStartPrinting()
{
    SftPrintPreview_Print(m_Preview, m_hWnd);
}

See Also C/C++ API | C++ Classes | Notifications