ShellAPI;
function ShellExecute(hWnd: HWND; Operation, FileName, Parameters, Directory: LPWSTR; ShowCmd: Integer): HINST; stdcall;
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https://msdn.microsoft.com/en-us/library/windows/desktop/bb762153(v=vs.85).aspx
Performs an
operation on a specified file.
Syntax
HINSTANCE ShellExecute(
_In_opt_ HWND hwnd,
_In_opt_ LPCTSTR lpOperation,
_In_ LPCTSTR lpFile,
_In_opt_ LPCTSTR lpParameters,
_In_opt_ LPCTSTR lpDirectory,
_In_ INT nShowCmd
);
Parameters
hwnd [in, optional]
Type: HWND
A handle to
the parent window used for displaying a UI or error messages. This value can
be NULL if the operation is not associated with a window.
lpOperation [in,
optional]
Type: LPCTSTR
A pointer to
a null-terminated string, referred to in this case as a verb,
that specifies the action to be performed. The set of available verbs depends
on the particular file or folder. Generally, the actions available from an
object's shortcut menu are available verbs. The following verbs are commonly
used:
edit
Launches an
editor and opens the document for editing. If lpFile is not a
document file, the function will fail.
explore
Explores a
folder specified by lpFile.
find
Initiates a
search beginning in the directory specified by lpDirectory.
open
Opens the item
specified by the lpFile parameter. The item can be a file or
folder.
print
Prints the
file specified by lpFile. If lpFile is not a
document file, the function fails.
NULL
The default
verb is used, if available. If not, the "open" verb is used. If
neither verb is available, the system uses the first verb listed in the
registry.
lpFile [in]
Type: LPCTSTR
A pointer to
a null-terminated string that specifies the file or object on which
to execute the specified verb. To specify a Shell namespace object, pass the
fully qualified parse name. Note that not all verbs are supported on all
objects. For example, not all document types support the "print"
verb. If a relative path is used for the lpDirectory parameter
do not use a relative path for lpFile.
lpParameters [in,
optional]
Type: LPCTSTR
If lpFile specifies
an executable file, this parameter is a pointer to a null-terminated
string that specifies the parameters to be passed to the application. The
format of this string is determined by the verb that is to be invoked. If lpFile specifies
a document file, lpParameters should be NULL.
lpDirectory [in,
optional]
Type: LPCTSTR
A pointer to
a null-terminated string that specifies the default (working)
directory for the action. If this value is NULL, the current
working directory is used. If a relative path is provided at lpFile,
do not use a relative path for lpDirectory.
nShowCmd [in]
Type: INT
The flags that
specify how an application is to be displayed when it is opened. If lpFile specifies
a document file, the flag is simply passed to the associated application. It is
up to the application to decide how to handle it. These values are defined in
Winuser.h.
SW_HIDE (0)
Hides the
window and activates another window.
SW_MAXIMIZE (3)
Maximizes the
specified window.
SW_MINIMIZE (6)
Minimizes the
specified window and activates the next top-level window in the z-order.
SW_RESTORE (9)
Activates and
displays the window. If the window is minimized or maximized, Windows restores
it to its original size and position. An application should specify this flag
when restoring a minimized window.
SW_SHOW (5)
Activates the
window and displays it in its current size and position.
SW_SHOWDEFAULT (10)
Sets the show
state based on the SW_ flag specified in the STARTUPINFO structure
passed to the CreateProcess function
by the program that started the application. An application should call ShowWindow with
this flag to set the initial show state of its main window.
SW_SHOWMAXIMIZED (3)
Activates the
window and displays it as a maximized window.
SW_SHOWMINIMIZED (2)
Activates the
window and displays it as a minimized window.
SW_SHOWMINNOACTIVE (7)
Displays the
window as a minimized window. The active window remains active.
SW_SHOWNA (8)
Displays the
window in its current state. The active window remains active.
SW_SHOWNOACTIVATE (4)
Displays a
window in its most recent size and position. The active window remains active.
SW_SHOWNORMAL (1)
Activates and
displays a window. If the window is minimized or maximized, Windows restores it
to its original size and position. An application should specify this flag when
displaying the window for the first time.
Return value
Type: HINSTANCE
If the function
succeeds, it returns a value greater than 32. If the function fails, it returns
an error value that indicates the cause of the failure. The return value is
cast as an HINSTANCE for backward compatibility with 16-bit Windows
applications. It is not a true HINSTANCE, however. It can be cast only to
an int and compared to either 32 or the following error codes
below.
Return code
|
Description
|
0
|
The operating
system is out of memory or resources.
|
ERROR_FILE_NOT_FOUND
|
The specified
file was not found.
|
ERROR_PATH_NOT_FOUND
|
The specified
path was not found.
|
ERROR_BAD_FORMAT
|
The .exe file
is invalid (non-Win32 .exe or error in .exe image).
|
SE_ERR_ACCESSDENIED
|
The operating
system denied access to the specified file.
|
SE_ERR_ASSOCINCOMPLETE
|
The file name
association is incomplete or invalid.
|
SE_ERR_DDEBUSY
|
The DDE
transaction could not be completed because other DDE transactions were being
processed.
|
SE_ERR_DDEFAIL
|
The DDE
transaction failed.
|
SE_ERR_DDETIMEOUT
|
The DDE
transaction could not be completed because the request timed out.
|
SE_ERR_DLLNOTFOUND
|
The specified
DLL was not found.
|
SE_ERR_FNF
|
The specified
file was not found.
|
SE_ERR_NOASSOC
|
There is no
application associated with the given file name extension. This error will
also be returned if you attempt to print a file that is not printable.
|
SE_ERR_OOM
|
There was not
enough memory to complete the operation.
|
SE_ERR_PNF
|
The specified
path was not found.
|
SE_ERR_SHARE
|
A sharing
violation occurred.
|