The CreateDesktop function creates a new desktop on the window station associated with the calling process. It returns a handle that can be used to access the new desktop. The calling process must have an associated window station, either assigned by the system at process creation time or set by SetProcessWindowStation. A desktop is a secure object contained within a window station object. A desktop has a logical display surface and contains windows, menus, and hooks.
HDESK CreateDesktop(
| LPCTSTR lpszDesktop, | // name of the new desktop |
| LPCTSTR lpszDevice, | // reserved; must be NULL. |
| LPDEVMODE pDevMode, | // reserved; must be NULL |
| DWORD dwFlags, | // flags to control interaction with other applications |
| DWORD dwDesiredAccess, | // specifies access of returned handle |
| LPSECURITY_ATTRIBUTES lpsa | // specifies security attributes of the desktop |
| ); |
Parameters
lpszDesktop
Points to a null-terminated string specifying the name of the desktop to be created. Desktop names are case-insensitive and may not contain backslash characters (\).
lpszDevice
Reserved; must be NULL. The desktop uses the default display driver loaded at boot time.
pDevMode
Reserved; must be NULL.
dwFlags
A bit flag parameter that controls how the calling application will cooperate with other applications on the desktop. This parameter can specify zero or the following value:
| Value | Description |
| DF_ALLOWOTHERACCOUNTHOOK | Allows processes running in other accounts on the desktop to set hooks in this process. |
dwDesiredAccess
Specifies the type of access to the desktop. This parameter can be one or more of the following values:
| Value | Description |
| DESKTOP_CREATEMENU | Required to create a menu on the desktop. |
| DESKTOP_CREATEWINDOW | Required to create a window on the desktop. |
| DESKTOP_ENUMERATE | Required for the desktop to be enumerated. |
| DESKTOP_HOOKCONTROL | Required to establish any of the window hooks. |
| DESKTOP_JOURNALPLAYBACK | Required to perform journal playback on the desktop. |
| DESKTOP_JOURNALRECORD | Required to perform journal recording on the desktop. |
| DESKTOP_READOBJECTS | Required to read objects on the desktop. |
| DESKTOP_SWITCHDESKTOP | Required to activate the desktop using the SwitchDesktop function. |
| DESKTOP_WRITEOBJECTS | Required to write objects on the desktop. |
lpsa
Pointer to a SECURITY_ATTRIBUTES structure that determines whether the returned handle can be inherited by child processes. If lpsa is NULL, the handle cannot be inherited.
Windows NT: The lpSecurityDescriptor member of the structure specifies a security descriptor for the new desktop. If lpsa is NULL, the desktop inherits its security descriptor from the parent window station.
Windows 95: The lpSecurityDescriptor member of the structure is ignored.
Return Values
If the function succeeds, the return value is a handle to the newly created desktop.
If the function fails, the return value is NULL. To get extended error information, call GetLastError.
Remarks
The CreateDesktop function returns a handle that can be used to access the desktop.
See Also