使用C语言代码实现工厂端LCD RGB的测试程序

如下代码使用CreateWindow实现窗口的最大无边框及最前代码，可以编译成32位或64位的程序均可。不用担心无法编译版本的问题。

#include <windows.h>

int i = 0;

/* This is where all the input to the window goes to */
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam) {
	HDC hdc;    // handle to a device context

	switch (Message) {

		/* Upon destruction, tell the main thread to stop */
		case WM_DESTROY: {
			PostQuitMessage(0);
			break;
		}

		case WM_LBUTTONDOWN:
		case WM_KEYDOWN:
		{

			i++;
			RECT rect;

			hdc = GetDC(hwnd);
			GetClientRect(hwnd, &rect);

			switch (i) {
				case 1:
					FillRect(hdc, &rect, CreateSolidBrush(RGB(255, 0, 0)));
					break;
				case 2:
					FillRect(hdc, &rect, CreateSolidBrush(RGB(0, 255, 0)));
					break;
				case 3:
					FillRect(hdc, &rect, CreateSolidBrush(RGB(0, 0, 255)));
					break;
				case 4:
					FillRect(hdc, &rect, CreateSolidBrush(RGB(255, 255, 255)));
					break;
				case 5:
					ReleaseDC(hwnd, hdc);
					PostQuitMessage(0);
					break;
			}
			// release the dc back
			ReleaseDC(hwnd, hdc);
		}
		/* All other messages (a lot of them) are processed using default procedures */
		default:
			return DefWindowProc(hwnd, Message, wParam, lParam);
		}
	return 0;
}

/* The 'main' function of Win32 GUI programs: this is where execution starts */
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
	WNDCLASSEX wc; /* A properties struct of our window */
	HWND hwnd; /* A 'HANDLE', hence the H, or a pointer to our window */
	MSG msg; /* A temporary location for all messages */

	/* zero out the struct and set the stuff we want to modify */
	memset(&wc, 0, sizeof(wc));
	wc.cbSize = sizeof(WNDCLASSEX);
	wc.lpfnWndProc = WndProc; /* This is where we will send messages to */
	wc.hInstance = hInstance;
	wc.hCursor = LoadCursor(NULL, IDC_ARROW);

	/* White, COLOR_WINDOW is just a #define for a system color, try Ctrl+Clicking it */
	//wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
	wc.hbrBackground = CreateSolidBrush(RGB(0, 0, 0));
	wc.lpszClassName = L"WindowClass";
	wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); /* Load a standard icon */
	wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION); /* use the name "A" to use the project icon */

	if (!RegisterClassEx(&wc)) {
		MessageBox(NULL, L"Window Registration Failed!", L"Error!", MB_ICONEXCLAMATION | MB_OK);
		return 0;
	}

	hwnd = CreateWindowEx(WS_EX_CLIENTEDGE,
							L"WindowClass", 
							L"LCD RGB Test", 
							WS_VISIBLE | WS_POPUP | WS_MAXIMIZE | WS_THICKFRAME | WS_EX_TOPMOST,
		0, /* x */
		0, /* y */
		1920, /* width */
		1080, /* height */
		NULL, NULL, hInstance, NULL);

	if (hwnd == NULL) {
		MessageBox(NULL, L"Window Creation Failed!", L"Error!", MB_ICONEXCLAMATION | MB_OK);
		return 0;
	}

	LONG Style = GetWindowLongA(hwnd, GWL_STYLE);
	Style = Style & ~WS_CAPTION & ~WS_SYSMENU & ~WS_SIZEBOX;
	SetWindowLongA(hwnd, GWL_STYLE, Style);
	/*
		This is the heart of our program where all input is processed and
		sent to WndProc. Note that GetMessage blocks code flow until it receives something, so
		this loop will not produce unreasonably high CPU usage
	*/
	while (GetMessage(&msg, NULL, 0, 0) > 0) { /* If no error is received... */
		TranslateMessage(&msg); /* Translate key codes to chars if present */
		DispatchMessage(&msg); /* Send it to WndProc */
	}
	return msg.wParam;
}