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void DeviceMode(hWnd, hInstance, lpDestDevType, lpOutputfile)
HWND hWnd;
HANDLE hInstance;
LPSZ lpDestDevType;
LPSZ lpOutputfile;
 
The DeviceMode function sets the current settings (such as paper bin, paper
size, scaling, and orientation) for the device driver by prompting for those
modes with a dialog box. Control Panel calls the DeviceMode function when
the user requests the setting up the printer as part of printer
installation.
 
All printer drivers must export the DeviceMode function. Display drivers
that permit the user to change operating modes must export the DeviceMode
function.
 
Parameter      Description
────────────────────────────────────────────────────────────────────────────
 
hWnd           Identifies the parent window to use for the dialog box.
 
hInstance      Identifies the module instance of the device driver.
 
lpDestDevType  Points to a null-terminated string containing the device
               name. The application passes the same device-type name as
               specified in the CreateDC function.
 
lpOutputfile   Points to a null-terminated string containing the name of an
               MS-DOS file or device port. The application passes the same
               device type name as given in the CreateDC function.
 
Return Value
 
This function has no return value.
 
Comments
 
The export ordinal for this function is 13.
 
The DeviceMode function creates an application-modal dialog box using the
DialogBox function (USER.240). The dialog box must provide options for the
user to set the various settings of the device. DeviceMode does the
following:
 
1  Initializes the dialog box settings by retrieving the current environment
   using the GetEnvironment function (GDI.133), or by reading the
   environment from the corresponding device-specific section in the WIN.INI
   file.
 
2  Calls the DialogBox function to display the dialog box, then waits for
   the user to complete their changes. When the value returns from
   DialogBox, check the return value. Make subsequent updates only if the
   return value is IDOK.
 
3  Updates the current device environment by using the SetEnvironment
   function (GDI.132). Also, the function updates the corresponding
   device-specific section in the WIN.INI file.
 
4  Sends a WM_DEVMODE message to all applications informing them of a change
   to the device's operating modes.
 
The dialog box must provide at least a title bar and OK and Cancel buttons,
in addition to controls for the various operating modes. The title bar
should contain the name of the current printer model (if the driver supports
several models), but no other printer model information should be presented
in the dialog box. (The DeviceMode dialog box must not permit the user to
change printer models.)
 
If a device has too many options to fit in a single dialog box, DeviceMode
can provide nested dialog boxes, using buttons in the first dialog box to
access the others. In all cases, a dialog function for a DeviceMode dialog
box closes the dialog box if it receives a WM_COMMAND message with the
wParam parameter set to IDCANCEL. This message occurs when the user presses
the ESC key, or chooses the Cancel button in the dialog box, or when Windows
Help needs to close the dialog box in order to respond to a request for help
from another application.
 
Although Control Panel requires DeviceMode, most applications call the
ExtDeviceMode or AdvancedSetUpDialog function when the user makes a request
to set up the device. (Applications either directly or indirectly call
through the standard Printer Setup dialog box.) In drivers that provide
ExtDeviceMode, the DeviceMode typically calls ExtDeviceMode to set up the
device.
 
See Also
 
AdvancedSetUpDialog, ExtDeviceMode
 
 
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