How can my Window application always "on top"?

[johnsunbill]

Dear all,

I would like to write some codes in my Window application to let it alsway on "TOP" and will not be killed by Ctrl+Alt+Del. It means that nobody can use other application except they close my application. This will help me to prevent our operators only work with my application. I'm using PB version 5.

Thanks in advance for your advice.

Regards,

John

 

[Sajuks]

hi,

try using SetPosition() function for the frame window .
framewindow.SetPosition(TopMost!).


the other way would be to use an external function like
SetWindowPos(long hwnd, long hmode, int ix, int iy, int cx,
int cy, ulong flags) LIBRARY "USER32.DLL"

HTH
Regards

 

[johnsunbill]

Hi Sajuks,

Thanks for your help. It works with SetPosition(topMost!). My frame window always on top!
However, can we disable Ctrl+Alt+Del? Otherwise it's easy to kill my application?

Thanks again,
Regards,
John

 

[resdevlabs]

You might try adding code to the application close event. I would suggest that you create a window to take some input (say a secret password), call the window in the app close event, pass the data from the window back to the close event, and validate it so that you can actually close that app. If it doesn't validate, set the Return code so that the app doesn't close.

If that doesn't work, then there are Windows API calls that you can probably use, but it will get very involved and quite time consuming.

Good Luck, and let us know what solution you come up with.

Rob

 

[johnsunbill]

Hi Rob,

Thanks for your tips. I created a "response" window and called it in application close query event and check the password before closing my application. However, Ctrl+Alt+Del still can kill my appalication.
So it seems to me that "call APIs" must be the only way to meet my requirement.
Could you please share with me the API name and show me how we call them in PB to take the control of system function keys, for example: "Ctrl+Esc"and "Ctrl+Alt+Del"

Bests,

John

 

[resdevlabs]

John,

I don't know the API calls you need. I suggest you start your search at msdn.microsft.com/library. Drill down in the menus on the left - Windows Development | Windows API.

Sorry I can't help more.