ОШИБКА№2!!!

[Nikita1111]

#include <windows.h>
#include "resource.h"

BOOL CALLBACK DlgProc(HWND, UINT, WPARAM, LPARAM);
HWND hButton1,hButton2,hButton3,hButton4,hButton5,hButton6,hButton7,hButton8,hButton9;
HBITMAP hBmp[2];



int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInst, LPSTR lpszCmdLine, int nCmdShow)
{
	return DialogBox(hInstance, MAKEINTRESOURCE(IDD_DIALOG1),NULL,DlgProc);	
}

BOOL CALLBACK DlgProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch(message)
	{
		case WM_CLOSE:
			EndDialog(hWnd,0);
			return TRUE;

		case WM_INITDIALOG:
			{			
				hButton1=GetDlgItem(hWnd,IDC_BUTTON1);
				hButton2=GetDlgItem(hWnd,IDC_BUTTON2);
				hButton3=GetDlgItem(hWnd,IDC_BUTTON3);
				hButton4=GetDlgItem(hWnd,IDC_BUTTON4);
				hButton5=GetDlgItem(hWnd,IDC_BUTTON5);
				hButton6=GetDlgItem(hWnd,IDC_BUTTON6);
				hButton7=GetDlgItem(hWnd,IDC_BUTTON7);
				hButton8=GetDlgItem(hWnd,IDC_BUTTON8);
				hButton9=GetDlgItem(hWnd,IDC_BUTTON9);
				for(int i=0;i<2;i++)hBmp[i]=LoadBitmap(GetModuleHandle(0),MAKEINTRESOURCE(IDB_BITMAP1+i));
			}
		case WM_COMMAND:

			if(LOWORD(wParam)== IDC_BUTTON1)
			{
				SendMessage(hButton1, BM_SETIMAGE,WPARAM(IMAGE_BITMAP),LPARAM(hBmp[1]));				
			}

			if(LOWORD(wParam)== IDC_BUTTON2)
			{
				SendMessage(hButton2, BM_SETIMAGE,WPARAM(IMAGE_BITMAP),LPARAM(hBmp[1]));
			}

			if(LOWORD(wParam)== IDC_BUTTON3)
			{
				SendMessage(hButton3, BM_SETIMAGE,WPARAM(IMAGE_BITMAP),LPARAM(hBmp[1]));
			}

			if(LOWORD(wParam)== IDC_BUTTON4)
			{
				SendMessage(hButton4, BM_SETIMAGE,WPARAM(IMAGE_BITMAP),LPARAM(hBmp[1]));
			}

			if(LOWORD(wParam)== IDC_BUTTON5)
			{
				SendMessage(hButton5, BM_SETIMAGE,WPARAM(IMAGE_BITMAP),LPARAM(hBmp[1]));
			}

			if(LOWORD(wParam)== IDC_BUTTON6)
			{
				SendMessage(hButton6, BM_SETIMAGE,WPARAM(IMAGE_BITMAP),LPARAM(hBmp[1]));
			}

			if(LOWORD(wParam)== IDC_BUTTON7)
			{
				SendMessage(hButton7, BM_SETIMAGE,WPARAM(IMAGE_BITMAP),LPARAM(hBmp[1]));
			}

			if(LOWORD(wParam)== IDC_BUTTON8)
			{
				SendMessage(hButton8, BM_SETIMAGE,WPARAM(IMAGE_BITMAP),LPARAM(hBmp[1]));
			}

			if(LOWORD(wParam)== IDC_BUTTON9)
			{
				SendMessage(hButton9, BM_SETIMAGE,WPARAM(IMAGE_BITMAP),LPARAM(hBmp[1]));
			}		
			

			return TRUE;
	}

	return FALSE;
}

Подскажите какой функцией можно сделатьтак что бы при нажатии на кнопку левой кнопкой был рисунок один а при нажатии правой кнопки рисунок другой!
пробую чот не получается!
делал так:

if(LOWORD(wParam)== IDC_BUTTON1)
			{
		case WM_LBUTTONDOWN:
				SendMessage(hButton1, BM_SETIMAGE,WPARAM(IMAGE_BITMAP),LPARAM(hBmp[1]));				
			}
if(LOWORD(wParam)== IDC_BUTTON1)
			{
		case WM_RBUTTONDOWN:
				SendMessage(hButton1, BM_SETIMAGE,WPARAM(IMAGE_BITMAP),LPARAM(hBmp[0]));				
			}

Правильно мыслю или нет?