Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
GDI+: copying to the Clipboard (a) image of active FoxPro window/form, (b) image file
GDI+: Storing content of the Clipboard to a bitmap file
How to change display settings: screen resolution, screen refresh rate
GDI+: saving image of FoxPro form to graphics file (BMP, GIF, JPG, PNG, TIF)
Custom GDI+ class
Using FoxTray ActiveX control: System Tray Icon and menu attached to VFP form
How to convert a bitmap file to monochrome format (1 bpp)
Capturing keyboard activity of another application with the Raw Input API (VFP9)
Using Video Capture: displaying on FoxPro form frames and previewing video obtained from a digital camera
GDI+: Implementing image scrolling with inertia
Retrieving the name of the primary domain controller (PDC) and join status information
Storing content of the Clipboard to a bitmap file
Custom HttpRequest class (WinHTTP)
How to detect if additional monitor is connected and active
How to put a horizontal text scrolling on the form (a news line, marquee)
How to display Windows On-Screen Keyboard
Winsock: sending email messages (SMTP, port 25)
How to activate Windows Calculator
The SQLGetProp() creates a bridge between Visual FoxPro and the ODBC API
Custom HttpRequest class (WinINet)
How to change the name and the size of the font in the MessageBox dialog
How to create MD-5 and SHA-1 hash values from a string
Mapping and disconnecting network drives
Enumerating raw input devices attached to the system (keyboard, mouse, human interface device)
Disabling mouse and keyboard input for the main VFP window (with the app still running)

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More code examples    Listed functions    Add comment     W32 Constants      Translate this page Printer friendly version of this code sample
DECLARE INTEGER BlockInput IN user32 INTEGER fBlockIt

? BlockInput (1)
? "*** Input blocked"

FOR ii=1 TO 10
    DO dataproc
ENDFOR

? BlockInput (0)
? "*** Input unblocked"

PROCEDURE  dataproc
* it is just an emulation of a time-consuming procedure
    LOCAL ii
    WAIT WINDOW NOWAIT "Creating cursor..."
    CREATE CURSOR cs (id N(6), dt D)
    FOR ii=1 TO 10000
        INSERT INTO cs VALUES (ii, date()-ii)
    ENDFOR
    WAIT CLEAR
    ? Chr(9) + "- cursor created at " + TTOC (datetime())
    USE IN cs
RETURN

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509 bytes  
Created: 2001-08-02 12:00:00  
Modified: 2008-10-03 15:25:57  
Visits in 7 days: 65  
Listed functions:
BlockInput
Printer friendly API declarations
My comment:
WinNT4, User32.dll of apr-99: Cannot find entry point BlockInput in the DLL.

During the cycle of N times running the DATAPROC, the user input is practically blocked. You can not even access the Task Manager.

Though the good old CTRL+ALT+DEL still can break through. It is quite helpful in case you have a run-time error within this cycle. Otherwise you could not be able to get out.

Note that no key presses reach the keyboard buffer during the blocking. And this is not the delay like the Sleep function creates.
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