The following new USER functions have been added to Windows 3.1:
Function | Description |
CallNextHookEx | Passes hook information down the hook chain. |
CopyCursor | Copies a cursor. |
CopyIcon | Copies an icon. |
EnableCommNotification | Enables or disables WM_COMMNOTIFY posting to window. |
EnableScrollBar | Enables or disables scroll-bar arrows. |
GetClipCursor | Retrieves cursor-confining rectangle coordinates. |
GetCursor | Returns the current cursor handle. |
GetDCEx | Retrieves the handle of a device context. |
GetFreeSystemResources | Returns the percentage of free system resource space. |
GetMessageExtraInfo | Retrieves information about a hardware message. |
GetOpenClipboardWindow | Returns a handle of the window that currently has the clipboard open. |
GetQueueStatus | Determines the queued message type. |
GetSystemDebugState | Returns system-state information to a debugger. |
GetTimerResolution | Retrieves the timer resolution. |
GetWindowPlacement | Retrieves the show state and the normal (restored), minimized, and maximized positions of a window. |
hardware_event | Places a hardware message in the system queue. |
IsMenu | Determines whether a menu handle is valid. |
LockInput | Locks input to all tasks except the current one. |
LockWindowUpdate | Disables or reenables drawing in a window. |
MapWindowPoints | Converts points to another coordinate system. |
QuerySendMessage | Determines whether a message originated within a task. |
RedrawWindow | Updates a client rectangle or region. |
ScrollWindowEx | Scrolls a window's client area. |
SetWindowPlacement | Sets the show state and the normal (restored), minimized, and maximized positions of a window. |
SetWindowsHookEx | Installs a hook function into a hook chain. |
SubtractRect | Creates a rectangle from the difference between two rectangles. |
SystemParametersInfo | Queries or sets systemwide parameters. |
UnhookWindowsHookEx | Removes a function from the hook chain. |
WNetAddConnection | Adds network connections. |
WNetCancelConnection | Removes network connections. |
WNetGetConnection | Lists network connections. |