#include <windows.h>

#include <iostream>

CHAR szText[256] = { 0 };

#define PrintLog(x) WriteConsole(g_hStdout, x, strlen(x), NULL, NULL)

HINSTANCE g_hInst = NULL; //窗口句柄

HANDLE g_hStdout = NULL; //控制臺句柄

//OnPaint

void OnPaint(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam)

{

PAINTSTRUCT ps = { 0 };

HDC hDC = BeginPaint(hWnd, &ps);

Rectangle(hDC, 100, 100, 200, 200); //默認情況下是100個邏輯單位

int nOldMap = SetMapMode(hDC, MM_LOMETRIC);//0.1MM X方向向右，Y方向向上

Rectangle(hDC, 100, -100, 200, -200); //默認情況下是100個邏輯單位

SetMapMode(hDC, nOldMap);//恢復舊的映射模式

nOldMap = SetMapMode(hDC, MM_HIMETRIC);

Rectangle(hDC, 100, -100, 200, -200); //默認情況下是100個邏輯單位

SetMapMode(hDC, nOldMap);

nOldMap = SetMapMode(hDC, MM_ISOTROPIC);

SetViewportExtEx(hDC, 2, 2, NULL); //屏幕單位

SetWindowExtEx(hDC, 4, 4, NULL); //邏輯單位

SetWindowOrgEx(hDC, 100, 100, NULL); //X和Y偏移100

Rectangle(hDC, 100, 100, 200, 200); //默認情況下是100個邏輯單位

SetMapMode(hDC, nOldMap);

EndPaint(hWnd, &ps);

}

LRESULT CALLBACK WndProc(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam)

{

switch (nMsg)

{

case WM_PAINT:

OnPaint(hWnd, nMsg, wParam, lParam);

break;

case WM_DESTROY:

PostQuitMessage(0);

break;

}

return DefWindowProc(hWnd, nMsg, wParam, lParam);

}

BOOL RegisterWnd(LPSTR pszClassName)

{

WNDCLASSEX wce = { 0 };

wce.cbSize = sizeof(wce);

wce.cbClsExtra = 0;

wce.cbWndExtra = 0;

wce.hbrBackground = HBRUSH(COLOR_BTNFACE + 1);

wce.hCursor = NULL;

wce.hIcon = NULL;

wce.hIconSm = NULL;

wce.hInstance = g_hInst;

wce.lpfnWndProc = WndProc;

wce.lpszClassName = pszClassName;

wce.lpszMenuName = NULL;

wce.style = CS_HREDRAW | CS_VREDRAW;

ATOM atom = RegisterClassEx(&wce);

if (atom == NULL)

{

return FALSE;

}

else

{

return TRUE;

}

}

HWND CreateWnd(LPSTR pszClassName)

{

HWND hWnd = CreateWindowEx(0, pszClassName, "滅天", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,

CW_USEDEFAULT, NULL, NULL, g_hInst, 0);

return hWnd;

}

void ShowWnd(HWND hWnd)

{

ShowWindow(hWnd, SW_SHOW);

UpdateWindow(hWnd);

}

void Msg()

{

MSG msg = { 0 };

while (GetMessage(&msg, NULL, 0, 0))

{

TranslateMessage(&msg);

DispatchMessage(&msg);

}

}

void ConsoleWnd()

{

AllocConsole();

g_hStdout = GetStdHandle(STD_OUTPUT_HANDLE);

CHAR szText[] = "Debug start:\n";

WriteConsole(g_hStdout, szText, strlen(szText), NULL, NULL);

}

int WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd)

{

g_hInst = hInstance;

//ConsoleWnd();

RegisterWnd("oooo");

HWND hWnd = CreateWnd("oooo");

ShowWnd(hWnd);

Msg();

return 0;

}

來自為知筆記(Wiz)

轉載于:https://www.cnblogs.com/nfking/p/5573167.html

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