void DisplayPopupMenu(long x, long y){
	GetSystemMetrics(SM_MENUDROPALIGNMENT);//determine the correct horizontal alignment flag (TPM_LEFTALIGN or TPM_RIGHTALIGN) 
	HMENU temp= GetSubMenu(PopupMenu,0);
	TrackPopupMenu(temp,TPM_LEFTALIGN|TPM_RIGHTBUTTON,x,y,0,Window,NULL);
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam){
	switch(msg){
		case WM_DESTROY: PostQuitMessage(0);break;//when 'X' is clicked: quit application(sends a WM_QUIT)
		case WM_COMMAND: WMCommand(hWnd, msg, wParam, lParam);break;//function to buttons(listed ^up)
		case WM_RBUTTONUP: DisplayPopupMenu(LOWORD(lParam), HIWORD(lParam)); break;
			                          //WM_RBUTTONUP : actived when mouse right button is released( it uses iParam to
			                         //obtain x an y of the mouse, to get those we need the macro LOWORD(to x) andHIWORD(to y))
 
		}
		return(DefWindowProc(hWnd, msg, wParam, lParam));
	}

#include <windows.h>
//#include <winbase.h>
#include "resource.h"
 
 
 
HMENU PopupMenu;
HMENU Menu;
HWND Window;
HWND b_CreateWall;//just as normal windows interface, buttons are handles of a window
 
const int width=640;//screen width and height
const int height=480;
const int b_width=100;//button width and height
const int b_height=20;
 
 
//its a good idea create a function for WM_COMMAND, cause the msg handler(WndProc) will clutter
//if i make it all with 'case:'
//same parameters of the handler
//converts b_CreateWall to LPARAM e compare with lParam, if its the same, a buttom is clicked
void WMCommand(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam){
	if(lParam==(LPARAM)b_CreateWall) MessageBoxA(Window,"apertou 'b_CreateWall'","botao",MB_OK);
 
	else if(wParam==ID_FILE_EXIT40003)PostQuitMessage(0);//if clicked exit on file menu
 
	else if(wParam==ID_DRAWING_WIREFRAME){//if clicked it
		CheckMenuItem(Menu,ID_DRAWING_WIREFRAME,MF_CHECKED);
		CheckMenuItem(Menu,ID_DRAWING_SOLID,MF_UNCHECKED);
	}
	else if(wParam==ID_DRAWING_SOLID){
		CheckMenuItem(Menu,ID_DRAWING_SOLID,MF_CHECKED);
		CheckMenuItem(Menu,ID_DRAWING_WIREFRAME,MF_UNCHECKED);
	}
 
	//popup menu:
	else if(wParam==ID_POPUP_MOVE) MessageBoxA(Window,"apertou 'Move'","clicked",MB_OK);
	else if(wParam==ID_POPUP_DUPLICATE) MessageBoxA(Window,"apertou 'Duplicate'","clicked",MB_OK);
	else if(wParam==ID_POPUP_DELETE) MessageBoxA(Window,"apertou 'Delete'","clicked",MB_OK);
	else if(wParam==ID_POPUP_TEXTURE) MessageBoxA(Window,"apertou 'Texture'","clicked",MB_OK);
}
 
void DisplayPopupMenu(long x, long y){
	GetSystemMetrics(SM_MENUDROPALIGNMENT);//determine the correct horizontal alignment flag (TPM_LEFTALIGN or TPM_RIGHTALIGN) 
	HMENU temp= GetSubMenu(PopupMenu,0);
	TrackPopupMenu(temp,TPM_LEFTALIGN|TPM_RIGHTBUTTON,x,y,0,Window,NULL);
}
 
// the message handler
 //(handle to the current window, type of message being sent,additional info about message being sent,
 // additional info about message being sent)
LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam){
	switch(msg){
		case WM_DESTROY: PostQuitMessage(0);break;//when 'X' is clicked: quit application(sends a WM_QUIT)
		case WM_COMMAND: WMCommand(hWnd, msg, wParam, lParam);break;//function to buttons(listed ^up)
		case WM_RBUTTONUP: DisplayPopupMenu(LOWORD(lParam), HIWORD(lParam)); break;
			                          //WM_RBUTTONUP : actived when mouse right button is released( it uses iParam to
			                         //obtain x an y of the mouse, to get those we need the macro LOWORD(to x) andHIWORD(to y))
 
		}
		return(DefWindowProc(hWnd, msg, wParam, lParam));
	}
	//The DefWindowProc function will  ensure that all messages are processed 
	//either through their respective message handler or through a default message
	//same parameters from WndProc callback
 
 
// main XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
//XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,LPSTR IpCmdLine,int nShowCmd){
 
	WNDCLASS wc;
	MSG msg;//message
 
	//register a window class
	wc.cbClsExtra=0;                                       //extra bytes of memory for the wndclass size
	wc.cbWndExtra=0;                                       //extra bytes for the windows instance
	wc.hbrBackground=(HBRUSH)GetStockObject(LTGRAY_BRUSH);//sets the background color
	wc.hCursor=LoadCursor(NULL, IDC_ARROW);               //sets the cursor for the window(current instance,ID of cursor)
	wc.hIcon=LoadIcon(NULL,IDI_APPLICATION);//sets the icon for the application(// , // of the icon)
	//We set this first parameter as NULL to indicate we want to use the standard
    //Windows icons/cursors rather than specifying custom resources
	wc.hInstance=hInstance;                              //requires the handle of the instance( witch is hInstance from WinMain)
	wc.lpfnWndProc=WndProc;                               //pointer to the window procedure, our message handler
	wc.lpszClassName=L"TESTANDO";                        //the class name
	wc.lpszMenuName=NULL;                                //controls the menu that is to be loaded for the window class
	wc.style= CS_OWNDC|CS_HREDRAW|CS_VREDRAW;            //CS_HREDRAW and CS_VREDRAW,will redraw the screen when 
	                                                     //the width or height of the client window has been changed,and CS_OWNDC,
	                                                     //which gives each registered class a unique device context
 
	//now i have to register the class
	//if succefull a diferent of 0 number will return
	//if error, it will return 0
	if(!RegisterClass(&wc)){
		MessageBoxA(NULL,"DEU PAU!!! Nao registro a classe", "TAQUIUPARIU!!!", MB_OK);
		return 0;
	}
 
	//now create the window
	//WS_OVERLAPPEDWINDOW: creates a window with max and min buttons
	//WS_VISIBLE: allow windows to be visible uppon creation
	//x and y coordinates
	//hWndParent:NULL cause this is the parent, used just when a child must be created
	//hMenu: load menu, but at now i dont need
	//current instance
	//multiple-document interface (MDI)-?complex stuff
	Window=CreateWindowA("TESTANDO","Teste WinApi",WS_OVERLAPPEDWINDOW|WS_VISIBLE,100,100,640,480,
		                 NULL,NULL,hInstance,NULL);
 
	//create button
	//(BUTTON to it know its a button,name,that will be a child not an independent window
	//any window only parameter here will be diregarded,x,y,w,h,the parent(created just before)
	b_CreateWall=CreateWindowA("BUTTON","Criar Parede",WS_CHILD|WS_VISIBLE,0,100,b_width,b_height,
		                      Window,NULL,hInstance,NULL);
	Menu     =LoadMenu(hInstance,MAKEINTRESOURCEW(IDR_MENU1));
	SetMenu(Window,Menu);
 
	PopupMenu=LoadMenu(hInstance,MAKEINTRESOURCEW(IDR_MENU2));
	//test
	if(Window==NULL){
		MessageBoxA(NULL,"IHH,NAO DEU PRA CRIA WINDOW","Pau na janela",MB_OK);
		return 0;
	}
 
	//now the main loop
 
 
	//peek message
	//message address,handle of the window we are getting messages from,range of the messages
	//we can use,range of the messages we can use(0 default),PM_NOREMOVE, which	does not remove 
	//the message from the message queue, and PM_REMOVE,
	//if theres no data on the qeue, it returns 0
	//If the message is not WM_QUIT, then we must call the TranslateMessage and Dispatch-
	//Message functions, which will translate a message from virtual keypresses to
	//character messages and dispatch the new message to the window procedure.
	while(1){
		if(PeekMessage(&msg,NULL,0,0,PM_REMOVE)){
			if(msg.message==WM_QUIT) break;
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}
 
 
 
	return 1;
}

case WM_RBUTTONUP: 
   POINT p;
   p.x = LOWORD(lParam);
   p.y = HIWORD(lParam);
   ClientToScreen(hWnd, &p);
   DisplayPopupMenu(p.x, p.y);
   break;