crtmbox.cpp File Reference

#include <corecrt_internal.h>
#include <corecrt_internal_traits.h>

Include dependency graph for crtmbox.cpp:

Go to the source code of this file.

Classes
struct	anonymous_namespace{crtmbox.cpp}::message_box_arguments< Character >

Namespaces
namespace	anonymous_namespace{crtmbox.cpp}

Functions
template<typename Character >
static int __cdecl	common_show_message_box (Character const *const text, Character const *const caption, unsigned const type) throw ()
int __cdecl	__acrt_show_narrow_message_box (char const *const text, char const *const caption, unsigned const type)
int __cdecl	__acrt_show_wide_message_box (wchar_t const *const text, wchar_t const *const caption, unsigned const type)

Function Documentation

__acrt_show_narrow_message_box()

int __cdecl __acrt_show_narrow_message_box	(	char const *const	text,
		char const *const	caption,
		unsigned const	type
	)

Definition at line 78 of file crtmbox.cpp.

{
    return common_show_message_box(text, caption, type);
}

__acrt_show_wide_message_box()

int __cdecl __acrt_show_wide_message_box	(	wchar_t const *const	text,
		wchar_t const *const	caption,
		unsigned const	type
	)

Definition at line 87 of file crtmbox.cpp.

{
    return common_show_message_box(text, caption, type);
}

common_show_message_box()

template<typename Character >

static int __cdecl common_show_message_box ( Character const *const  text, Character const *const  caption, unsigned const  type  ) throw ( )

static

Definition at line 29 of file crtmbox.cpp.

{
    using traits = __crt_char_traits<Character>;
 
    bool const debugger_attached = IsDebuggerPresent();
    if (debugger_attached)
    {
        // Output the message to the attached debugger.  This is useful when
        // remotely debugging.
        if (text)
        {
            traits::output_debug_string(text);
        }
 
        // We do not want to display a message box if a debugger
        // is already attached, unless it's a desktop app.
        // Instead, let the caller know that we want to
        // directly break into the debugger:
        bool const is_desktop_app = __acrt_get_windowing_model_policy() == windowing_model_policy_hwnd;
        if (!is_desktop_app)
        {
            return IDRETRY; // Retry = Break into the debugger
        }
    }
 
    bool const show_ui = __acrt_get_developer_information_policy() == developer_information_policy_ui;
    if (!show_ui || !__acrt_can_show_message_box())
    {
        // If we can't get the message box pointers (perhaps because running on CoreSys),
        // just abort, unless a debugger is attached--then break into the debugger instead.
        // The message string was already output to the debugger above.
        return debugger_attached ? IDRETRY : IDABORT;
    }
 
    // If the current process isn't attached to a visible window station (e.g.
    // a non-interactive service), then we need to set the MB_SERVICE_NOTIFICATION
    // flag, otherwise the message box will be invisible, stalling the program.
    if (!__acrt_is_interactive())
    {
        return traits::message_box(nullptr, text, caption, type | MB_SERVICE_NOTIFICATION);
    }
 
    return traits::message_box(__acrt_get_parent_window(), text, caption, type);
}

Referenced by __acrt_show_narrow_message_box(), and __acrt_show_wide_message_box().