Siemens SIMATIC HMI series System Manual

Note
"MB_SYSTEMMODAL" parameter
Execution of
a message box function with parameter "MB_SYSTEMMODAL" ensures that the
message box is displayed in the foreground. If this parameter is not specified, the message
box is hidden to users and (in the background) and cannot be operated. Mouse click events
outside the message box are written to a buffer and processed after you exit the message box.
Example: MessageBox(NULL, "Welt", "Hallo", MB_SYSTEMMODAL | MB_OK);
WinCC diagnosis
6.3 ApDiag Menu Commands
WinCC: General information and installation
180 System Manual, 02/2017, A5E40840020-AA

Siemens SIMATIC HMI series Specifications

General

Brand	Siemens
Model	SIMATIC HMI series
Category	Control Panel
Language	English