5 step to create Window with windows API use C
5 steps:
1. Initialzate class
2. Resgister class
3. Create window
4. Receive message from WinProc
5. Translate message and dispatch it
Step 1: Initialzate class
I like way http://www.winprog.org/tutorial/simple_window.html use:
In WinMain() function:
Use CreateWindowEx() function - put it after Register class ( still in WinMain())
Check return value:
Step 4: The Message Loop
In WinMain(), after create window:
Step 5: the Window Procedure
Full Soure:
complete:
Thanks for reading
--------------------------------------------------------------------------
All my Lab:
Linux Lab -- window and Cisco Lab
to be continued - I will update more.
1. Initialzate class
2. Resgister class
3. Create window
4. Receive message from WinProc
5. Translate message and dispatch it
Step 1: Initialzate class
I like way http://www.winprog.org/tutorial/simple_window.html use:
const char g_szClassName[] = "myWindowClass";Step 2: Registering the Window Class
In WinMain() function:
WNDCLASSEX wc;
wc.cbSize = sizeof(WNDCLASSEX);Step 3: Creating the Window
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = NULL;
wc.lpszClassName = g_szClassName;
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
if(!RegisterClassEx(&wc))
{
MessageBox(NULL, "Window Registration Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
Use CreateWindowEx() function - put it after Register class ( still in WinMain())
hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
g_szClassName,
"Project Zero again!!!",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,
NULL, NULL, hInstance, NULL);
Check return value:
if(hwnd == NULL)Show and update Window:
{
MessageBox(NULL, "Window Creation Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
Step 4: The Message Loop
In WinMain(), after create window:
while(GetMessage(&Msg, NULL, 0, 0) > 0)
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}
return Msg.wParam;
Step 5: the Window Procedure
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CLOSE:
DestroyWindow(hwnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
return 0;
}
Full Soure:
#include
const char g_szClassName[] = "myWindowClass";
// Step 4: the Window Procedure
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CLOSE:
DestroyWindow(hwnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
return 0;
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASSEX wc;
HWND hwnd;
MSG Msg;
//Step 1: Registering the Window Class
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = NULL;
wc.lpszClassName = g_szClassName;
wc.hIconSm = LoadIcon(NULL, IDI_WINLOGO);
if(!RegisterClassEx(&wc))
{
MessageBox(NULL, "Window Registration Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
// Step 2: Creating the Window
hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
g_szClassName,
"Project Zero again!!!",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,
NULL, NULL, hInstance, NULL);
if(hwnd == NULL)
{
MessageBox(NULL, "Window Creation Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
// Step 3: The Message Loop
while(GetMessage(&Msg, NULL, 0, 0) > 0)
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}
return Msg.wParam;
}
complete:
C:\Code\Dev>gcc -o project0 main.crun:
C:\Code\Dev>project0.exe------------------------------------------------------------
Thanks for reading
--------------------------------------------------------------------------
All my Lab:
Linux Lab -- window and Cisco Lab
to be continued - I will update more.
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