新建win32项目
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如果有自动生成stdio.h，把里面的
#define WIN32_LEAN_AND_MEAN
注释掉
否则添加#include <windows.h>
------------------------
添加h
#include <gdiplus.h>
打开名字空间
using namespace Gdiplus;
添加lib
#pragma comment(lib,"gdiplus.lib")
-----------------------
winmain函数最上面添加
ULONG_PTR token;
GdiplusStartupInput gsi;
GdiplusStartup(&token,&gsi,0);
最下面返回前添加
GdiplusShutdown(token);
--------------------------
wndproc 里添加
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...
OnPaint(hdc);
EndPaint(hWnd, &ps);
break;
---------------
添加画图函数
void OnPaint(HDC hdc){
Graphics g(hdc);
Gdiplus::Image img(L"img.jpg");
Pen pen(Color(233,24,22));
g.DrawImage(&img,PointF());
g.DrawLine(&pen,0,0,100,100);
}
其中img.jpg为当前目录（调试时为当前项目文件夹）下的一张图片
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好了，自己玩玩吧
摘自：http://hi.baidu.com/kikoqiu/item/2e60f12b4dd123f850fd87d3
纯win32实现PNG图片透明窗体\
#include <windows.h>
#include <gdiplus.h>
#pragma comment(lib,"gdiplus.lib")
/* GDI+ startup token */
ULONG_PTR gdiplusStartupToken;
/* Declare Windows procedure */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
// UpdateLayeredWindow Defination
typedef BOOL(*UPDATELAYEREDWINDOWFUNCTION)(HWND,HDC,POINT*,SIZE*,HDC,POINT*,COLORREF,BLENDFUNCTION*,DWORD);
/* Make the class name into a global variable */
TCHAR szClassName[ ] = L"PNGDialog";
int WINAPI WinMain (HINSTANCE hThisInstance,
HINSTANCE hPrevInstance,
LPSTR lpszArgument,
int nCmdShow)
{
/**/
Gdiplus::GdiplusStartupInput gdiInput;
Gdiplus::GdiplusStartup(&gdiplusStartupToken,&gdiInput,NULL);
/**/
HWND hwnd; /* This is the handle for our window */
MSG messages; /* Here messages to the application are saved */
WNDCLASSEX wincl; /* Data structure for the windowclass */
/* The Window structure */
wincl.hInstance = hThisInstance;
wincl.lpszClassName = szClassName;//+-69+
wincl.lpfnWndProc = WindowProcedure; /* This function is called by windows */
wincl.style =WS_OVERLAPPED; /* Catch double-clicks */
wincl.cbSize = sizeof (WNDCLASSEX);
/* Use default icon and mouse-pointer */
wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
wincl.lpszMenuName = NULL; /* No menu */
wincl.cbClsExtra = 0; /* No extra bytes after the window class */
wincl.cbWndExtra = 0; /* structure or the window instance */
/* Use Windows's default colour as the background of the window */
wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
/* Register the window class, and if it fails quit the program */
if (!RegisterClassEx (&wincl))
return 0;
/* The class is registered, let's create the program*/
hwnd = CreateWindowEx (
WS_EX_LAYERED|WS_EX_TOPMOST|WS_EX_TOOLWINDOW, /* Extended possibilites for variation */
szClassName, /* Classname */
L"PNGDialog Example Application", /* Title Text */
WS_OVERLAPPEDWINDOW, /* default window */
CW_USEDEFAULT, /* Windows decides the position */
CW_USEDEFAULT, /* where the window ends up on the screen */
500, /* The programs width */
500, /* and height in pixels */
HWND_DESKTOP, /* The window is a child-window to desktop */
NULL, /* No menu */
hThisInstance, /* Program Instance handler */
NULL /* No Window Creation data */
);
/* Make the window visible on the screen */
ShowWindow (hwnd, nCmdShow);
LONG style = ::GetWindowLong(hwnd,GWL_STYLE);
if(style&WS_CAPTION)
style^=WS_CAPTION;
if(style&WS_THICKFRAME)
style^=WS_THICKFRAME;
if(style&WS_SYSMENU)
style^=WS_SYSMENU;
::SetWindowLong(hwnd,GWL_STYLE,style);
style = ::GetWindowLong(hwnd,GWL_EXSTYLE);
if(style&WS_EX_APPWINDOW)
style^=WS_EX_APPWINDOW;
::SetWindowLong(hwnd,GWL_EXSTYLE,style);
/********************************************
* step 1.
* Using Gdiplus to load the image
********************************************/
RECT wndRect;
::GetWindowRect(hwnd,&wndRect);
SIZE wndSize = {wndRect.right-wndRect.left,wndRect.bottom-wndRect.top};
HDC hdc = ::GetDC(hwnd);
HDC memDC = ::CreateCompatibleDC(hdc);
HBITMAP memBitmap = ::CreateCompatibleBitmap(hdc,wndSize.cx,wndSize.cy);
::SelectObject(memDC,memBitmap);
Gdiplus::Image image(L"F:\\我的作品\\C#作品\\垃圾清理专家\\_撮鸟识别器\\image\\close.png");
Gdiplus::Graphics graphics(memDC);
graphics.DrawImage(&image,0,0,wndSize.cx,wndSize.cy);
/********************************************
* step 2.
* Get "UpdateLayeredWindow" function's
* proc address.
********************************************/
HMODULE hUser32 = ::LoadLibrary(L"User32.dll");
if(!hUser32)
{
return FALSE;
}
UPDATELAYEREDWINDOWFUNCTION UpdateLayeredWindow = (UPDATELAYEREDWINDOWFUNCTION)::GetProcAddress(hUser32,"UpdateLayeredWindow");
if(!UpdateLayeredWindow)
{
return FALSE;
}
// get screen dc
HDC screenDC = GetDC(NULL);
POINT ptSrc = {0,0};
/*********************************************
* step 3.
* Use UpdateLayeredWindow to Draw the Window
*
*********************************************/
BLENDFUNCTION blendFunction;
blendFunction.AlphaFormat = AC_SRC_ALPHA;
blendFunction.BlendFlags = 0;
blendFunction.BlendOp = AC_SRC_OVER;
blendFunction.SourceConstantAlpha = 255;
UpdateLayeredWindow(hwnd,screenDC,&ptSrc,&wndSize,memDC,&ptSrc,0,&blendFunction,2);
::DeleteDC(memDC);
::DeleteObject(memBitmap);
/* Run the message loop. It will run until GetMessage() returns 0 */
while (GetMessage (&messages, NULL, 0, 0))
{
/* Translate virtual-key messages into character messages */
TranslateMessage(&messages);
/* Send message to WindowProcedure */
DispatchMessage(&messages);
}
Gdiplus::GdiplusShutdown(gdiplusStartupToken);
/* The program return-value is 0 - The value that PostQuitMessage() gave */
return messages.wParam;
}
/* This function is called by the Windows function DispatchMessage() */
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) /* handle the messages */
{
case WM_DESTROY:
PostQuitMessage (0); /* send a WM_QUIT to the message queue */
break;
case WM_LBUTTONDOWN:
//::SendMessage(hwnd,WM_HIT)
break;
default: /* for messages that we don't deal with */
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}
摘自：http://blog.csdn.net/bhlzlx/article/details/7481601