My LoadImage isn't Working - I need to know why - c++

Question

Look At this code and please tell me why when I compile it I see a blank white screen:
#include <windows.h>
#include <fstream.h>
#include <stdlib.h>
static char g_szClassName[] = "TEST";
static HINSTANCE g_hInst = NULL;
int savenumber = 1;
char savestring[] = "abc";
HWND hwnd;
HDC hdcWindow;
PAINTSTRUCT ps;
RECT rc;
//HBITMAP mario1,mario2,mario3,mario4,mario5,mario6,
// block1,block2,block3,scene1,scene1mask;
HBITMAP scene1;
BITMAP bm;
LRESULT CALLBACK
WndProc(HWND hwnd, UINT nMsg, WPARAM wParam, LPARAM lParam)
{
HBITMAP g_hbitmap = NULL;
switch(nMsg)
{
case WM_CREATE:
g_hbitmap = (HBITMAP)LoadImage(GetModuleHandle(NULL),
"C:\\Users\\Onwer\\Desktop\\Cpp code Initiate\\Jacob GRAPIC#3 cpp renewal!\\G3-Images\\scene.bmp",
IMAGE_BITMAP,
640,
320,
LR_LOADFROMFILE);
/*
mario1 = LoadBitmap(g_hInst, "MARIO1BMP");
mario2 = LoadBitmap(g_hInst, "MARIO2BMP");
mario3 = LoadBitmap(g_hInst, "MARIO3BMP");
mario4 = LoadBitmap(g_hInst, "MARIO4BMP");
mario5 = LoadBitmap(g_hInst, "MARIO5BMP");
mario6 = LoadBitmap(g_hInst, "MARIO6BMP");
block1 = LoadBitmap(g_hInst, "BLOCK1BMP");
block2 = LoadBitmap(g_hInst, "BLCOK2BMP");
block3 = LoadBitmap(g_hInst, "BLOCK3BMP");
scene1 = LoadBitmap(g_hInst, "SCENE1BMP");
scene1mask = LoadBitmap(g_hInst, "SCENE1MASKBMP");
*/
scene1 = LoadBitmap(g_hInst, "SCENE1BMP");
break;
case WM_TIMER:
break;
case WM_PAINT:
hdcWindow = BeginPaint(hwnd, &ps);
GetClientRect (hwnd, &rc);
drawScene (hdcWindow);
//DrawText(hdcWindow,"This Is a Test!", -1, &rc,
//DT_SINGLELINE | DT_TOP | DT_TOP );
EndPaint(hwnd, &ps);
break;
case WM_COMMAND:
break;
case WM_CLOSE:
DestroyWindow(hwnd);
break;
case WM_DESTROY:
/*
DeleteObject(mario1);
DeleteObject(mario2);
DeleteObject(mario3);
DeleteObject(mario4);
DeleteObject(mario5);
DeleteObject(mario6);
DeleteObject(block1);
DeleteObject(block2);
DeleteObject(block3);
*/
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, nMsg, wParam, lParam);
}
return 0;
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow)
{
ofstream SaveFile ("save.txt");
SaveFile << savenumber << '\n' << savestring;
WNDCLASSEX WndClass;
HWND hwndMain;
MSG Msg;
g_hInst = hInstance;
WndClass.cbSize = sizeof(WNDCLASSEX);
WndClass.style = 0;
WndClass.lpfnWndProc = WndProc;
WndClass.cbClsExtra = 0;
WndClass.cbWndExtra = 0;
WndClass.hInstance = g_hInst;
WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
WndClass.hbrBackground = (HBRUSH)(COLOR_BTNFACE);
WndClass.lpszMenuName = NULL;
WndClass.lpszClassName = g_szClassName;
WndClass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
if(!RegisterClassEx(&WndClass))
{
MessageBox(0, "Window Registration Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);
return 0;
}
hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
g_szClassName,
"TEST",
WS_OVERLAPPEDWINDOW,
//CW_USEDEFAULT, CW_USEDEFAULT, 677, 358,
CW_USEDEFAULT, CW_USEDEFAULT, 800, 500,
NULL, NULL, g_hInst, NULL);
if(hwnd == NULL)
{
MessageBox(0, "Window Creation Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);
return 0;
}
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
while(GetMessage(&Msg, NULL, 0, 0))
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}
return Msg.wParam;
}
I need to know why LoadImage doesn't display the picture designated. Is it not even supposed to? And if its not supposed t: tell me what function that goes with loadImage I should use, that is part of Windows.h in C++. I am using the Dev-C++ compiler.

Answer 1

All LoadImage does it loads an image, nothing else. If you want your application to draw an image in a window you have to do it yourself.
The contents of drawScene() were commented out (since removed in an edit) and your WM_PAINT handler doesn't perform any drawing operations. If your bitmap was successfully loaded you will need to do something like below when you handle the WM_PAINT message.
hdcMemory = CreateCompatibleDC(hdcWindow);
HGDIOBJ oldBitmap = SelectObject(hdcMemory, g_hbitmap);
BitBlt(hdcWindow, 0, 0, 640, 320, hdcMemory, 0, 0, SRCCOPY);
SelectObject(hdcMemory, oldBitmap);
DeleteDC(hdcMemory);