BitBlt
The BitBlt function performs a bit-block transfer of the color data corresponding to a
rectangle of pixels from the specified source device context into a destination device
context.
BOOL BitBlt(
HDC hdcDest, // handle of destination device context
int nXDest, // x-coord of dest rectangle's upper-left corner
int nYDest, // x-coord of dest rectangle's upper-left corner
int nWidth, // width of destination rectangle
int nHeight, // height of destination rectangle
HDC hdcSrc, // handle of source device context
int nXSrc, // x-coord of src rectangle's upper-left corner
int nYSrc, // y-coord of src rectangle's upper-left corner
DWORD dwRop // raster operation code
);
Returns
If the function succeeds, the return value is TRUE.
If the function fails, the return value is FALSE. To get extended error information,
call GetLastError.
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CreateWindow
The CreateWindow function creates an overlapped, pop-up, or child window. It specifies
the window class, window title, window style, and (optionally) the initial position and
size of the window. The function also specifies the window's parent or owner, if any,
and the window's menu.
HWND CreateWindow(
LPCTSTR lpClassName, // address of registered class name
LPCTSTR lpWindowName, // address of window name
DWORD dwStyle, // window style
int x, // horizontal position of window
int y, // vertical position of window
int nWidth, // window width
int nHeight, // window height
HWND hWndParent, // handle of parent or owner window
HMENU hMenu, // handle of menu or child-window identifier
HANDLE hInstance, // handle of application instance
LPVOID lpParam // address of window-creation data
);
Returns
If the function succeeds, the return value is the handle of the new window.
If the function fails, the return value is NULL. To get extended error information,
call GetLastError.
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CreateWindowExA / CreateWindowExW
The CreateWindowEx function creates an overlapped, pop-up, or child window with an
extended style; otherwise, this function is identical to the CreateWindow function.
For more information about creating a window and for full descriptions of the other
parameters of CreateWindowEx, see CreateWindow.
HWND CreateWindowEx(
DWORD dwExStyle, // extended window style
LPCTSTR lpClassName, // address of registered class name
LPCTSTR lpWindowName, // address of window name
DWORD dwStyle, // window style
int x, // horizontal position of window
int y, // vertical position of window
int nWidth, // window width
int nHeight, // window height
HWND hWndParent, // handle of parent or owner window
HMENU hMenu, // handle of menu, or child-window identifier
HINSTANCE hInstance, // handle of application instance
LPVOID lpParam // address of window-creation data
);
Returns
If the function succeeds, the return value is the handle of the new window.
If the function fails, the return value is NULL.
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SendMessageA / SendMessageW
The SendMessage function sends the specified message to a window or windows. The function
calls the window procedure for the specified window and does not return until the window
procedure has processed the message. The PostMessage function, in contrast, posts a
message to a thread's message queue and returns immediately.
LRESULT SendMessage(
HWND hwnd, // handle of destination window
UINT uMsg, // message to send
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
);
Returns
The return value specifies the result of the message processing and depends on the
message sent.
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ShowWindow
The ShowWindow function sets the specified window's show state.
BOOL ShowWindow(
HWND hwnd, // handle of window
int nCmdShow // show state of window
);
Returns
If the window was previously visible, the return value is TRUE. If the window was
previously hidden, the return value is FALSE.
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UpdateWindow
The UpdateWindow function updates the client area of the specified window by sending a
WM_PAINT message to the window if the window's update region is not empty. The function
sends a WM_PAINT message directly to the window procedure of the specified window,
bypassing the application queue. If the update region is empty, no message is sent.
BOOL UpdateWindow(
HWND hwnd // handle of window
);
Returns
If the function succeeds, the return value is TRUE.
If the function fails, the return value is FALSE.
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00. INDEX
03. Breakpoints & Win API Details
8 Window Generating