windows截图代码
作者：互联网
注意点：
1.在大屏的笔记本：要去显示设置里面把缩放调到100%
2.获取屏幕坐标的注意点https://blog.csdn.net/zhangweishuang/article/details/5966105?utm_source=jiancool
// ICONDEMO.cpp : 定义应用程序的入口点。
// #include "stdafx.h"
#include "ICONDEMO.h" // 此代码模块中包含的函数的前向声明:
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPWSTR lpCmdLine,
_In_ int nCmdShow)
{
static TCHAR szAppName[] = TEXT("Blowup");
HACCEL hAccel;
HWND hwnd;
MSG msg;
WNDCLASS wndclass; wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION);
wndclass.hCursor = LoadCursor(nullptr, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = szAppName;
wndclass.lpszClassName = szAppName; if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("This program requires Windows NT!"), szAppName, MB_ICONERROR);
return 0;
} hwnd = CreateWindow(szAppName, TEXT("Blow-Up Mouse Demo"), WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL); ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd); hAccel = LoadAccelerators(hInstance, szAppName); // 主消息循环:
while (GetMessage(&msg, nullptr, 0, 0))
{
if (!TranslateAccelerator(hwnd, hAccel, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return msg.wParam;
} void InvertBlock(HWND hwndScr, HWND hwnd, POINT ptBeg, POINT ptEnd)
{
HDC hdc;
hdc = GetDCEx(hwndScr, NULL, DCX_CACHE | DCX_LOCKWINDOWUPDATE);
ClientToScreen(hwnd, &ptBeg);
ClientToScreen(hwnd, &ptEnd); PatBlt(hdc, ptBeg.x, ptBeg.y, ptEnd.x - ptBeg.x, ptEnd.y - ptBeg.y, DSTINVERT);
ReleaseDC(hwndScr, hdc);
} HBITMAP CopyBitmap(HBITMAP hBitmapSrc)
{
BITMAP bitmap;
HBITMAP hBitmapDst;
HDC hdcSrc, hdcDst;
GetObject(hBitmapSrc, sizeof(BITMAP), &bitmap);
hBitmapDst = CreateBitmapIndirect(&bitmap); hdcSrc = CreateCompatibleDC(NULL);
hdcDst = CreateCompatibleDC(NULL); SelectObject(hdcSrc, hBitmapSrc);
SelectObject(hdcDst, hBitmapDst); BitBlt(hdcDst, 0, 0, bitmap.bmWidth, bitmap.bmHeight, hdcSrc, 0, 0, SRCCOPY); DeleteDC(hdcSrc);
DeleteDC(hdcDst); return hBitmapDst;
} //
// 函数: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// 目的: 处理主窗口的消息。
//
// WM_COMMAND - 处理应用程序菜单
// WM_PAINT - 绘制主窗口
// WM_DESTROY - 发送退出消息并返回
//
//
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static BOOL bCapturing, bBlocking;
static HBITMAP hBitmap;
static HWND hwndScr;
static POINT ptBeg, ptEnd;
BITMAP bm;
HBITMAP hBitmapClip;
HDC hdc, hdcMem;
int iEnable;
PAINTSTRUCT ps;
RECT rect;
POINT point; switch (message)
{
case WM_LBUTTONDOWN:
if (!bCapturing)
{
if (LockWindowUpdate(hwndScr = GetDesktopWindow()))
{
bCapturing = TRUE;
SetCapture(hwnd);
SetCursor(LoadCursor(NULL, IDC_CROSS));
}
else
{
MessageBeep(0);
}
}
return 0;
case WM_RBUTTONDOWN:
if (bCapturing)
{
bBlocking = TRUE;
/* ptBeg.x = LOWORD(lParam);
ptBeg.y = HIWORD(lParam);*/
ptBeg.x = MAKEPOINTS(lParam).x;
ptBeg.y = MAKEPOINTS(lParam).y;
ptEnd = ptBeg;
InvertBlock(hwndScr, hwnd, ptBeg, ptEnd);
}
return 0;
case WM_MOUSEMOVE:
if (bBlocking)
{
InvertBlock(hwndScr, hwnd, ptBeg, ptEnd);
ptEnd.x = MAKEPOINTS(lParam).x;
ptEnd.y = MAKEPOINTS(lParam).y;
InvertBlock(hwndScr, hwnd, ptBeg, ptEnd);
}
return 0;
case WM_LBUTTONUP:
case WM_RBUTTONUP:
if (bBlocking)
{
InvertBlock(hwndScr, hwnd, ptBeg, ptEnd);
ptEnd.x = MAKEPOINTS(lParam).x;
ptEnd.y = MAKEPOINTS(lParam).y;
if (hBitmap)
{
DeleteObject(hBitmap);
hBitmap = NULL;
}
//hdc = GetDC(hwndScr);
hdc = GetDCEx(hwndScr, NULL, DCX_CACHE | DCX_LOCKWINDOWUPDATE);
hdcMem = CreateCompatibleDC(hdc);
hBitmap = CreateCompatibleBitmap(hdc, abs(ptEnd.x - ptBeg.x), abs(ptEnd.y - ptBeg.y));
SelectObject(hdcMem, hBitmap);
point = ptBeg;
ClientToScreen(hwnd,&point);
StretchBlt(hdcMem, 0, 0, abs(ptEnd.x - ptBeg.x), abs(ptEnd.y - ptBeg.y), hdc, point.x, point.y, ptEnd.x - ptBeg.x, ptEnd.y - ptBeg.y, SRCCOPY);
DeleteDC(hdcMem);
ReleaseDC(hwnd, hdc);
InvalidateRect(hwnd, NULL, TRUE);
}
if (bBlocking || bCapturing)
{
bBlocking = bCapturing = FALSE;
SetCursor(LoadCursor(NULL, IDC_ARROW));
ReleaseCapture();
LockWindowUpdate(NULL);
}
return 0;
case WM_INITMENUPOPUP:
iEnable = IsClipboardFormatAvailable(CF_BITMAP) ? MF_ENABLED : MF_GRAYED;
EnableMenuItem((HMENU)wParam, IDM_EDIT_PASTE, iEnable); iEnable = hBitmap ? MF_ENABLED : MF_GRAYED;
EnableMenuItem((HMENU)wParam, IDM_EDIT_CUT, iEnable);
EnableMenuItem((HMENU)wParam, IDM_EDIT_COPY, iEnable);
EnableMenuItem((HMENU)wParam, IDM_EDIT_DELETE, iEnable);
return 0;
case WM_COMMAND:
switch (LOWORD(wParam))
{
case IDM_EDIT_CUT:
case IDM_EDIT_COPY:
if (hBitmap)
{
hBitmapClip = CopyBitmap(hBitmap);
OpenClipboard(hwnd);
EmptyClipboard();
SetClipboardData(CF_BITMAP, hBitmapClip);
}
if (LOWORD(wParam) == IDM_EDIT_COPY)
{
return 0;
} case IDM_EDIT_DELETE:
if (hBitmap)
{
DeleteObject(hBitmap);
hBitmap = NULL;
}
InvalidateRect(hwnd, NULL, TRUE);
return 0;
case IDM_EDIT_PASTE:
if (hBitmap)
{
DeleteObject(hBitmap);
hBitmap = NULL;
}
OpenClipboard(hwnd);
hBitmapClip = (HBITMAP)GetClipboardData(CF_BITMAP);
if (hBitmapClip)
{
hBitmap = CopyBitmap(hBitmapClip);
}
CloseClipboard();
InvalidateRect(hwnd, NULL, TRUE);
return 0;
}
break;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
if (hBitmap)
{
GetClientRect(hwnd, &rect);
hdcMem = CreateCompatibleDC(hdc);
SelectObject(hdcMem, hBitmap);
GetObject(hBitmap, sizeof(BITMAP), (PSTR)&bm);
SetStretchBltMode(hdc, COLORONCOLOR);
StretchBlt(hdc, 0, 0, rect.right, rect.bottom, hdcMem, 0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
DeleteDC(hdcMem);
}
EndPaint(hwnd, &ps);
return 0;
case WM_DESTROY:
if (hBitmap)
{
DeleteObject(hBitmap);
}
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
// #include "stdafx.h"
#include "ICONDEMO.h" // 此代码模块中包含的函数的前向声明:
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPWSTR lpCmdLine,
_In_ int nCmdShow)
{
static TCHAR szAppName[] = TEXT("Blowup");
HACCEL hAccel;
HWND hwnd;
MSG msg;
WNDCLASS wndclass; wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION);
wndclass.hCursor = LoadCursor(nullptr, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = szAppName;
wndclass.lpszClassName = szAppName; if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("This program requires Windows NT!"), szAppName, MB_ICONERROR);
return 0;
} hwnd = CreateWindow(szAppName, TEXT("Blow-Up Mouse Demo"), WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL); ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd); hAccel = LoadAccelerators(hInstance, szAppName); // 主消息循环:
while (GetMessage(&msg, nullptr, 0, 0))
{
if (!TranslateAccelerator(hwnd, hAccel, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return msg.wParam;
} void InvertBlock(HWND hwndScr, HWND hwnd, POINT ptBeg, POINT ptEnd)
{
HDC hdc;
hdc = GetDCEx(hwndScr, NULL, DCX_CACHE | DCX_LOCKWINDOWUPDATE);
ClientToScreen(hwnd, &ptBeg);
ClientToScreen(hwnd, &ptEnd); PatBlt(hdc, ptBeg.x, ptBeg.y, ptEnd.x - ptBeg.x, ptEnd.y - ptBeg.y, DSTINVERT);
ReleaseDC(hwndScr, hdc);
} HBITMAP CopyBitmap(HBITMAP hBitmapSrc)
{
BITMAP bitmap;
HBITMAP hBitmapDst;
HDC hdcSrc, hdcDst;
GetObject(hBitmapSrc, sizeof(BITMAP), &bitmap);
hBitmapDst = CreateBitmapIndirect(&bitmap); hdcSrc = CreateCompatibleDC(NULL);
hdcDst = CreateCompatibleDC(NULL); SelectObject(hdcSrc, hBitmapSrc);
SelectObject(hdcDst, hBitmapDst); BitBlt(hdcDst, 0, 0, bitmap.bmWidth, bitmap.bmHeight, hdcSrc, 0, 0, SRCCOPY); DeleteDC(hdcSrc);
DeleteDC(hdcDst); return hBitmapDst;
} //
// 函数: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// 目的: 处理主窗口的消息。
//
// WM_COMMAND - 处理应用程序菜单
// WM_PAINT - 绘制主窗口
// WM_DESTROY - 发送退出消息并返回
//
//
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static BOOL bCapturing, bBlocking;
static HBITMAP hBitmap;
static HWND hwndScr;
static POINT ptBeg, ptEnd;
BITMAP bm;
HBITMAP hBitmapClip;
HDC hdc, hdcMem;
int iEnable;
PAINTSTRUCT ps;
RECT rect;
POINT point; switch (message)
{
case WM_LBUTTONDOWN:
if (!bCapturing)
{
if (LockWindowUpdate(hwndScr = GetDesktopWindow()))
{
bCapturing = TRUE;
SetCapture(hwnd);
SetCursor(LoadCursor(NULL, IDC_CROSS));
}
else
{
MessageBeep(0);
}
}
return 0;
case WM_RBUTTONDOWN:
if (bCapturing)
{
bBlocking = TRUE;
/* ptBeg.x = LOWORD(lParam);
ptBeg.y = HIWORD(lParam);*/
ptBeg.x = MAKEPOINTS(lParam).x;
ptBeg.y = MAKEPOINTS(lParam).y;
ptEnd = ptBeg;
InvertBlock(hwndScr, hwnd, ptBeg, ptEnd);
}
return 0;
case WM_MOUSEMOVE:
if (bBlocking)
{
InvertBlock(hwndScr, hwnd, ptBeg, ptEnd);
ptEnd.x = MAKEPOINTS(lParam).x;
ptEnd.y = MAKEPOINTS(lParam).y;
InvertBlock(hwndScr, hwnd, ptBeg, ptEnd);
}
return 0;
case WM_LBUTTONUP:
case WM_RBUTTONUP:
if (bBlocking)
{
InvertBlock(hwndScr, hwnd, ptBeg, ptEnd);
ptEnd.x = MAKEPOINTS(lParam).x;
ptEnd.y = MAKEPOINTS(lParam).y;
if (hBitmap)
{
DeleteObject(hBitmap);
hBitmap = NULL;
}
//hdc = GetDC(hwndScr);
hdc = GetDCEx(hwndScr, NULL, DCX_CACHE | DCX_LOCKWINDOWUPDATE);
hdcMem = CreateCompatibleDC(hdc);
hBitmap = CreateCompatibleBitmap(hdc, abs(ptEnd.x - ptBeg.x), abs(ptEnd.y - ptBeg.y));
SelectObject(hdcMem, hBitmap);
point = ptBeg;
ClientToScreen(hwnd,&point);
StretchBlt(hdcMem, 0, 0, abs(ptEnd.x - ptBeg.x), abs(ptEnd.y - ptBeg.y), hdc, point.x, point.y, ptEnd.x - ptBeg.x, ptEnd.y - ptBeg.y, SRCCOPY);
DeleteDC(hdcMem);
ReleaseDC(hwnd, hdc);
InvalidateRect(hwnd, NULL, TRUE);
}
if (bBlocking || bCapturing)
{
bBlocking = bCapturing = FALSE;
SetCursor(LoadCursor(NULL, IDC_ARROW));
ReleaseCapture();
LockWindowUpdate(NULL);
}
return 0;
case WM_INITMENUPOPUP:
iEnable = IsClipboardFormatAvailable(CF_BITMAP) ? MF_ENABLED : MF_GRAYED;
EnableMenuItem((HMENU)wParam, IDM_EDIT_PASTE, iEnable); iEnable = hBitmap ? MF_ENABLED : MF_GRAYED;
EnableMenuItem((HMENU)wParam, IDM_EDIT_CUT, iEnable);
EnableMenuItem((HMENU)wParam, IDM_EDIT_COPY, iEnable);
EnableMenuItem((HMENU)wParam, IDM_EDIT_DELETE, iEnable);
return 0;
case WM_COMMAND:
switch (LOWORD(wParam))
{
case IDM_EDIT_CUT:
case IDM_EDIT_COPY:
if (hBitmap)
{
hBitmapClip = CopyBitmap(hBitmap);
OpenClipboard(hwnd);
EmptyClipboard();
SetClipboardData(CF_BITMAP, hBitmapClip);
}
if (LOWORD(wParam) == IDM_EDIT_COPY)
{
return 0;
} case IDM_EDIT_DELETE:
if (hBitmap)
{
DeleteObject(hBitmap);
hBitmap = NULL;
}
InvalidateRect(hwnd, NULL, TRUE);
return 0;
case IDM_EDIT_PASTE:
if (hBitmap)
{
DeleteObject(hBitmap);
hBitmap = NULL;
}
OpenClipboard(hwnd);
hBitmapClip = (HBITMAP)GetClipboardData(CF_BITMAP);
if (hBitmapClip)
{
hBitmap = CopyBitmap(hBitmapClip);
}
CloseClipboard();
InvalidateRect(hwnd, NULL, TRUE);
return 0;
}
break;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
if (hBitmap)
{
GetClientRect(hwnd, &rect);
hdcMem = CreateCompatibleDC(hdc);
SelectObject(hdcMem, hBitmap);
GetObject(hBitmap, sizeof(BITMAP), (PSTR)&bm);
SetStretchBltMode(hdc, COLORONCOLOR);
StretchBlt(hdc, 0, 0, rect.right, rect.bottom, hdcMem, 0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
DeleteDC(hdcMem);
}
EndPaint(hwnd, &ps);
return 0;
case WM_DESTROY:
if (hBitmap)
{
DeleteObject(hBitmap);
}
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
标签：截图,windows,hwnd,代码,ptBeg,hdc,hBitmap,NULL,ptEnd 来源： https://www.cnblogs.com/xiaomi-daming/p/12993108.html