/****************************************
WinTreeMenuCommands.cpp  == Windows Last Left Threaded Data Tree Menu Commands
This function is called from switch(message) WM_COMMAND : 
Menu command have lParam = 0.
This was done to simplify WinProc.
Use:

LRESULT SendMessage( HWND hWnd, 
 // handle of destination window 
 
UINT Msg, 
 // message to send 
 
WPARAM wParam, 
 // first message parameter 
 
LPARAM lParam 
 // second message parameter  
); 
 
To send the instruction back to WinProc.
****************************************/
 
#include "WinTree.h" // WinTree1.h is 'ifndef' so wont be multipled defind

void
WinTreeCommand(HWND hwnd, HINSTANCE hInstance, WPARAM wParam, LPARAM lParam, bool& fDoesTreeExist)   {

HMENU hMenu = GetMenu(hwnd);

int i = LOWORD(wParam) ;

  switch(LOWORD(wParam))
	  {
    case ID_FILE_EXIT:
	   SendMessage (hwnd, WM_DESTROY, 0, 0 ) ;
		  break ;
    case ID_EDIT_EDITNODE:   
      // You use cast for some reason, to (DLGPROC), this was from Jervis.
      //lpDialogFunc Points to the dialog box procedure. For more information 
			// about the dialog box procedure, see the DialogProc callback function. 
      // See also Dialog Boxes. Avoiding Global Variables. 510.// pad = (ABOUTBOX_DATA *) lParam ; 
		  DialogBox (hInstance, TEXT("IDD_EDIT_NODE"), hwnd, (DLGPROC) EditDlgProc) ;      
      SendMessage (hwnd, WM_KEYDOWN, 0, 0 ) ;
      break ;     
    case ID_VIEW_DISPLAYTREEINFO:
		 SendMessage (hwnd, WM_KEYDOWN, VK_SPACE, 0 ) ;
		  break ;
    case ID_REMOVENODE_REMOVEL:
	   SendMessage (hwnd, WM_KEYDOWN, VK_LEFT, 0 ) ;
		  break ;
    case ID_REMOVENODE_REMOVEMOSTSIGNIFICANTNODE:
		 SendMessage (hwnd, WM_KEYDOWN, VK_RIGHT , 0 ) ;
		  break ;
    case ID_REMOVENODE_REMOVETREEROOT:
	   SendMessage (hwnd, WM_KEYDOWN, VK_UP, 0 ) ;
		  break ;
    case ID_REMOVENODE_REMOVEMEDIANNODE:
		 SendMessage (hwnd, WM_KEYDOWN, VK_DOWN , 0 ) ;
		  break ; 	
		case ID_HELP_A:  
			// You use cast for some reason, to (DLGPROC), this was from Jervis.
      //lpDialogFunc Points to the dialog box procedure. For more information 
			// about the dialog box procedure, see the DialogProc callback function. 
      // See also Dialog Boxes. Avoiding Global Variables. 510.// pad = (ABOUTBOX_DATA *) lParam ; 
			DialogBox (hInstance, TEXT("WINTREE2_0_3_0"), hwnd, (DLGPROC) AboutDlgProc) ;
			break ;
	  } // End "switch"

if( !(fDoesTreeExist) ) {
	EnableMenuItem(hMenu, ID_VIEW_DISPLAYTREEINFO, MF_GRAYED);
	EnableMenuItem(hMenu, ID_REMOVENODE_REMOVEL, MF_GRAYED);
	EnableMenuItem(hMenu, ID_REMOVENODE_REMOVEMOSTSIGNIFICANTNODE, MF_GRAYED);
	EnableMenuItem(hMenu, ID_REMOVENODE_REMOVETREEROOT, MF_GRAYED);
	EnableMenuItem(hMenu, ID_REMOVENODE_REMOVEMEDIANNODE, MF_GRAYED);
  EnableMenuItem(hMenu, ID_EDIT_EDITNODE, MF_GRAYED);
	} // End of 'if' on "fDoesTreeExist"

 
} // End  "WinTreeCommand"