Window not visible
- From: nullius filius <son@xxxxxxxxxxxxxxx>
- Date: Fri, 15 Feb 2008 16:32:26 +0900
The following SDK application works fine using gcc-
gcc -mwindows simple_window.c -o first_sdk.c
But compiling with VC6 my application window is invisible.
Nmake -f makefile
Attached are the source code (first_sdk.c) and
the makefile I am using to compile code.
How do I set a window visible?
/* File: first_sdk.c
*
* Description:
*
*
* Created:
* 12 Feb 2008 -
*/
#include <windows.h>
LONG WINAPI WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpszCmdLine, int nCmdShow){
WNDCLASS wc;
HWND hwnd;
MSG msg;
wc.style = 0; /* Class style */
wc.lpfnWndProc = (WNDPROC) WndProc; /* Window procedure address */
wc.cbClsExtra = 0; /* Class extra bytes */
wc.hInstance = hInstance; /* Window extra bytes */
wc.hIcon = LoadIcon(NULL, IDI_WINLOGO); /* Icon handle */
wc.hCursor = LoadCursor (NULL, IDC_ARROW); /* Cursor handle */
wc.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1); /* Background color
*/
wc.lpszMenuName = NULL; /* Menu name */
wc.lpszClassName = "MyWndClass"; /* WNDCLASS */
RegisterClass (&wc);
hwnd = CreateWindow("MyWndClass", /* WNDCLASS */
"SDK Application", /* Window title */
WS_OVERLAPPEDWINDOW, /* Window style */
CW_USEDEFAULT, /* Horizontal position */
CW_USEDEFAULT, /* Vertical position */
CW_USEDEFAULT, /* Initial width */
CW_USEDEFAULT, /* Initial height */
HWND_DESKTOP, /* Handle of parent window
*/
NULL, /* Menu handle */
hInstance, /* Application's instance
handle */
NULL /* Window-creation data */
);
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
while(GetMessage(&msg, NULL, 0, 0)){
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam,
LPARAM lParam){
PAINTSTRUCT ps;
HDC hdc;
switch(message){
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
Ellipse (hdc, 0, 0, 200, 100);
EndPaint(hwnd, &ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
# File: makefile
#
# Description:
#
#
# Created:
# 15 Feb 2008 -
#
# Nmake macros for building Windows 32-Bit apps
!include <win32.mak>
PROJ = first_sdk
all: $(PROJ).exe
# Define project specific macros
PROJ_OBJS= first_sdk.obj
BASE_OBJS =
EXTRA_LIBS=
GLOBAL_DEP=
RC_DEP=
# Inference rule for updating the object files
..c.obj:
$(cc) $(cdebug) $(cflags) $(cvars) $*.c
# Build rule for EXE
$(PROJ).EXE: $(BASE_OBJS) $(PROJ_OBJS)
$(link) $(linkdebug) $(guilflags) \
$(BASE_OBJS) $(PROJ_OBJS) $(guilibs) $(EXTRA_LIBS) \
-out:$(PROJ).exe $(MAPFILE)
.
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