window programming API - LoadImage - winapi

Question

I am learning window API programming.
However I am getting stuck in loading image and showing on the window.
#include <windows.h>
#include <stdio.h>
#define wname "mywin"
LRESULT CALLBACK WndProc(HWND h,UINT im,WPARAM wp,LPARAM lp);
int APIENTRY WinMain(HINSTANCE his, HINSTANCE prev,LPSTR cmd, int cshow)
{
WNDCLASS wc;
wc.cbClsExtra=0;
wc.cbWndExtra=0;
wc.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
wc.hCursor=LoadCursor(NULL,IDC_ARROW);
wc.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wc.lpszMenuName=NULL;
wc.style=CS_HREDRAW | CS_VREDRAW;
wc.hInstance = his;
wc.lpszClassName = wname;
wc.lpfnWndProc = (WNDPROC)WndProc;
RegisterClass(&wc);
HWND h = CreateWindow(wname, wname, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
NULL, (HMENU) NULL, his, NULL );
ShowWindow(h, cshow);
MSG Message;
while(GetMessage(&Message,0,0,0))
{
TranslateMessage(&Message);
DispatchMessage(&Message);
}
}
LRESULT CALLBACK WndProc(HWND h, UINT im, WPARAM wp, LPARAM lp)
{
HBITMAP static hbm;
HDC static mdc;
BITMAP static bm;
switch(im)
{
case WM_CREATE:
{
hbm = (HBITMAP) LoadImage(NULL, "../img/1.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
GetObject(hbm, sizeof(bm), &bm);
if(!hbm)
{
MessageBox(h, "Error loading bitmap", "msg", MB_OK);
}
break;
}
case WM_PAINT:
{
HDC hdc = GetDC(h);
mdc = CreateCompatibleDC(hdc);
SelectObject(mdc, hbm);
BitBlt(hdc, 0, 0, bm.bmWidth, bm.bmHeight, mdc, 0, 0, SRCCOPY);
break;
}
}
I tried this code.
There is no grammer error, but the output is wierd.
Picture appears, but without window, and the program stopped.
I think the probelm is on WM_CREATE part in 'LRESULT CALLBACK WndProc' , but cannot figure out exactly what is wrong. HELP!!!
(WinMain is ok, here is no problem)

Answer 1

It seems you have no return value for WndProc and probably Win32 messages are not processed by default.
(after case WM_PAINT):
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}