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/ Guidelines: Additional control elements / Progress-bar / Usage of Progress-bar
Usage of Progress-bar
In PROGRESS.DLL version 2.0 PrgShowDlg() function changed. New features
were added, but backwards compatibility was preserved, so additional
parameters are optional. Here is new syntax:
HWND APIENTRY PrgShowDlg(HWND hwndParent, // Progress dialog parent window
HWND hwndOwner, // Progress dialog owner window
USHORT fsFlags, // Flags to specify properties
// of the Progress Dialog.
// PRS_* constants are to be used.
HMODULE hmodResource, // Module handle of the resource
// file. Use -1 for PROGRESS.DLL,
// 0 - for executable,
// other - module handle, obtained
// with DosLoadModule call.
ULONG ulIcon, // Resource ID of the PNG
// sequence in the hmodResource.
// For PROGRESS.DLL ID_PROGRESS_PNG_ICON*
// constants to be used. Ignored if
// PRS_ICON flag is not set.
ULONG ulBar, // Resource ID of the pair of PNG images
// in the hmodRsource. For PROGRESS.DLL
// ID_PROGRESS_PNG_BAR constant to be used.
// Ignored if PRS_BAR and PRG_IMAGE flags
// are not set.
USHORT usId, // Progress Bar dialog control ID. Used
// to recognize Progress Dialog among
// other controls and to determine command
// value of WM_COMMAND message sent by
// Progress Dialog to its owner, when
// user tries to interrupt a process.
PSZ pszTitle, // Title of the dialog control. If NULL,
// progress dialog window have no
// titlebar and no frame.
PSZ pszButton1, // Caption on the button to allow user
// to interrupt process. If NULL no button
// apperas in the dialog and process cannot
// be interrupted.
PSZ pszCaption1, // The first (topmost) caption in the
// dialog. Could be NULL, if the caption
// is unused
PSZ pszCaption2, // The second caption in the dialog. Could
// be NULL, if the caption is unused
PSZ pszCaption3, // The third caption in the dialog.
// Could be NULL, if the caption is
// unused. If this caption is too
// long it will be broken into several lines.
[PSZ pszButon2[ , // Button 2 caption. Significant
// only when PRS_BUT_2 flag is specified.
PSZ pszButton3[ , // Button 3 caption. Significant only when
// PRS_BUT_3 flag is specified.
PSZ pszButtonHelp[ , // Help Button caption. Significant
// only when PRS_BUT_HELP flag is specified.
LANGE hLange]]]]); // LANGE handle. Significant only
// when PRS_OWNLANGE flag is specified.
As you can see, in version 2.0 progress dialog can contain up to 3 action buttons and one help button, Just specify appropriate PRS_BUT_* flag and button caption parameter. You can also specify LANGE handle to let PROGRESS.DLL automatically translate all captions using LANGE library.
Another additional flag is PRS_DISMISS. If this flag is set, progress bar dialog will be automatically dismissed, when any action button (not help button) is clicked. Otherwise, dialog will not be dismissed, WM_COMMAND message will be posted to the dialog's owner instead.
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