Add new API for getting bookmark ID

ref: https://community.notepad-plus-plus.org/topic/23541/notepad-v8-4-6-release/22?_=1664842498334

PowerEditor/src/MISC/PluginsManager/Notepad_plus_msgs.h

@@ -544,6 +544,13 @@ enum Platform { PF_UNKNOWN, PF_X86, PF_X64, PF_IA64, PF_ARM64 };
 	// void* NPPN_CREATELEXER(0, const TCHAR *lexer_name)
 	// Returns the ILexer pointer created by Lexilla
 
+	#define NPPM_GETBOOKMARKID (NPPMSG + 111)
+	// void* NPPM_GETBOOKMARKID(0, 0)
+	// Returns the bookmark ID
+
+
+
+	// For RUNCOMMAND_USER
 	#define VAR_NOT_RECOGNIZED 0
 	#define FULL_CURRENT_PATH 1
 	#define CURRENT_DIRECTORY 2
@@ -559,6 +566,7 @@ enum Platform { PF_UNKNOWN, PF_X86, PF_X64, PF_IA64, PF_ARM64 };
 	#define CURRENT_LINESTR 12
 
 	#define	RUNCOMMAND_USER    (WM_USER + 3000)
+
 	#define NPPM_GETFULLCURRENTPATH		(RUNCOMMAND_USER + FULL_CURRENT_PATH)
 	#define NPPM_GETCURRENTDIRECTORY	(RUNCOMMAND_USER + CURRENT_DIRECTORY)
 	#define NPPM_GETFILENAME			(RUNCOMMAND_USER + FILE_NAME)

PowerEditor/src/NppBigSwitch.cpp

@@ -2516,6 +2516,11 @@ LRESULT Notepad_plus::process(HWND hwnd, UINT message, WPARAM wParam, LPARAM lPa
 			return _pluginsManager.allocateMarker(static_cast<int32_t>(wParam), reinterpret_cast<int *>(lParam));
 		}
 
+		case NPPM_GETBOOKMARKID:
+		{
+			return MARK_BOOKMARK;
+		}
+
 		case NPPM_HIDETABBAR:
 		{
 			bool hide = (lParam != 0);