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SHELLEXECUTEINFO

Windows Mobile 6.5
A version of this page is also available for
4/8/2010

The SHELLEXECUTEINFO structure contains information used by the ShellExecuteEx function.


typedef struct _SHELLEXECUTEINFO { 
  DWORD cbSize; 
  ULONG fMask; 
  HWND hwnd; 
  LPCTSTR lpVerb; 
  LPCTSTR lpFile; 
  LPCTSTR lpParameters; 
  LPCTSTR lpDirectory; 
  int nShow; 
  HINSTANCE hInstApp; 
  LPVOID lpIDList; 
  LPCTSTR lpClass; 
  HKEY hkeyClass; 
  DWORD dwHotKey; 
  union {
    HANDLE hIcon;
    HANDLE hMonitor;
  } DUMMYUNIONNAME;
  HANDLE hProcess; 
} SHELLEXECUTEINFO, FAR* LPSHELLEXECUTEINFO;

cbSize

Size of the structure, in bytes.

fMask

Array of flags that indicate the content and validity of the other structure members. For Windows CE 1.0 and 1.01, fMask flags are unsupported. For Windows CE 2.0 and later, fMask can be a combination of the following values.

Value Description

SEE_MASK_FLAG_NO_UI

Does not display an error message box if an error occurs.

SEE_MASK_NOCLOSEPROCESS

Leaves the process running after the ShellExecuteEx function exits. The hProcess member receives the handle to the process.

hwnd

Window handle to any message boxes that the system may produce while executing this function.

lpVerb

Long pointer to a string specifying the name of a verb. The verb specifies an action for the application to perform. The set of available verbs depends on the particular file or folder. It includes the commands listed in the context menu and the registry. The following table shows verbs that are usually valid.

Value Description

Edit

The function opens an editor.

Find

The function initiates a search starting from the specified directory.

Open

The function opens the file specified by the lpFile parameter. The file can be an executable file or a document file. It can also be a folder. This is the default verb if no verb is specified.

Print

The function prints the document file specified by lpFile.

lpFile

Long pointer to a null-terminated string that specifies the absolute name of the file to open or print. The function can open an executable file or a document file, but it can only print a document file. Note that the concept of a current directory does not exist in Windows Embedded CE. You must specify the complete file path to specify the absolute file name.

lpParameters

Long pointer to a null-terminated string that contains the application parameters. The parameters must be separated by spaces. To include double quotation marks, you must enclose the marks in double quotation marks, as in the following example.

sei.lpParameters = "An example: \"\"\"quoted text\"\"\"";

In this case, the application receives three parameters: An, example:, and "quoted text".

If the lpFile member specifies a document file, this member should be NULL.

lpDirectory

Not supported. Set to zero.

nShow

Show flags. Can be one of the SW_* values described for the ShowWindow function. If lpFile specifies an executable file, this member specifies how the application is to be shown when it is opened.

hInstApp

This member is only valid if the function fails, in which case it receives one of the following error values, which are less than or equal to 32.

Value Description

SE_ERR_FNF

File not found.

SE_ERR_PNF

Path not found.

SE_ERR_ACCESSDENIED

Access denied.

SE_ERR_OOM

Out of memory.

SE_ERR_DLLNOTFOUND

Dynamic-link library not found.

SE_ERR_SHARE

Cannot share an open file.

SE_ERR_ASSOCINCOMPLETE

File association information not complete.

SE_ERR_DDETIMEOUT

DDE operation timed out.

SE_ERR_DDEFAIL

DDE operation failed.

SE_ERR_DDEBUSY

DDE operation is busy.

SE_ERR_NOASSOC

File association not available.

If the function succeeds, the value of this member should be ignored.

lpIDList

Ignored.

lpClass

Ignored.

hkeyClass

Ignored.

dwHotKey

Ignored.

hIcon

Ignored.

hProcess

Handle to the newly started application. This member is set on return and is always set to NULL if fMask is not set to SEE_MASK_NOCLOSEPROCESS.

The verbs available for an object are essentially the items that you find on an object's shortcut menu. To find which verbs are available, look in the registry under

HKEY_CLASSES_ROOT\<object_name>\Shell\<verb>

object_name is the name of the file object and verb is the name of the available verb. The verb subkey contains the data indicating what happens when that verb is invoked.

Each verb corresponds to the command that would be used to launch the application from a console window. The open verb is a good example, because it is commonly supported. For .exe files, open launches the application. However, it is more commonly used to launch an application that operates on a particular file. For instance, .txt files can be opened by Microsoft® WordPad. The open verb for a .txt file corresponds to the following command:

"C:\Program Files\Windows NT\Accessories\Wordpad.exe" "%1"

When you use ShellExecuteEx to open a .txt file, Wordpad.exe is launched with the specified file as its argument. Some commands can have additional arguments, such as flags, that can be added as needed to launch the application properly.

In general, trying to determine the list of available verbs for a particular file is somewhat complicated. In many cases, you can set the lpVerb member to NULL, which invokes the default command for the file class. This procedure is usually equivalent to setting lpVerb to open, but some file classes may have a different default command.

Headershellapi.h
Windows Embedded CEWindows CE 1.0 and later
Windows MobileWindows Mobile Version 5.0 and later

Reference

ShellExecuteEx
ShowWindow

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