[API]TextOut

TextOut함수는 문자열을 출력해주는 함수이다.

BOOL TextOut(HDC hdc,int nXStart,int nYStart,LPCTSTR lpString, int cbString);

TextOut원형이다.

DC의 팬들인 hdc, 출력할 XY좌표, 출력할문자혹은 문자열, 출력할문자열의 길이

ex)TextOut(hdc,100,100,TEXT("HELLO WORLD"),11);

ex2)TCHAR *str = TEXT("HELLO WORLD");

TextOut(hdc,100,100,str,lstrlen(str));

이렇게하면 문자열의 길이를 신경쓰지않아도된다.

소스코드를 보자

#include <Windows.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
HINSTANCE g_hInst;
LPCTSTR IpszClass = TEXT("First");

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR IpszCmdParam, int nCmdShow)
{
	HWND hWnd;
	WNDCLASS WndClass;
	MSG Message;
	g_hInst = hInstance;
	WndClass.cbClsExtra = 0;
	WndClass.cbWndExtra = 0;
	WndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
	WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	WndClass.hInstance = hInstance;
	WndClass.lpfnWndProc = WndProc;
	WndClass.lpszClassName = IpszClass;
	WndClass.lpszMenuName = NULL;
	WndClass.style = CS_HREDRAW | CS_VREDRAW;
	RegisterClass(&WndClass);

	hWnd = CreateWindow(IpszClass, IpszClass, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, (HMENU)NULL, hInstance, NULL);
	ShowWindow(hWnd, nCmdShow);

	while (GetMessage(&Message, NULL, 0, 0)) {
		TranslateMessage(&Message);
		DispatchMessage(&Message);
	}
	return (int)Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT iMessage, WPARAM wParam, LPARAM lParam)
{
	HDC hdc;
	switch (iMessage) {
	case WM_LBUTTONDOWN:
		hdc = GetDC(hWnd);
		TextOut(hdc, 100, 100, TEXT("HELLO WORLD"), 11);
		ReleaseDC(hWnd, hdc);
		return 0;
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	}
	return (DefWindowProc(hWnd, iMessage, wParam, lParam));
}

WM_LBUTTONDOWN 메세지를 받아들이면 DC를구하고, 출력을시키는구조이다.

메세지루프에서 LBUTTON을 받아들이면 바로 출력된다.

처음엔 빈화면이지만 클릭이벤트를 주게되면 곧바로 출력이된다.