다이얼로그 투명하게..

BOOL SetLayeredWindowAttributes(
  HWND hwnd,           // handle to the layered window
  COLORREF crKey,      // specifies the color key
  BYTE bAlpha,         // value for the blend function
  DWORD dwFlags        // action
);

typedef SLWA

선언:

typedef BOOL (WINAPI* SLWA)(HWND hWnd, COLORREF crKey, BYTE bAlpha, DWORD dwFlags);

#ifndef WS_EX_LAYERED
#define WS_EX_LAYERED       0x00080000
#define LWA_ALPHA           0x00000002
#endif

코딩:

void CDlgTestDlg::SetTransparency(HWND hwnd, int percent)
{
    SLWA pSetLayeredWindowAttributes = NULL;  // 함수포인터 선언, 초기화.
    HINSTANCE hmodUSER32 = LoadLibrary("USER32.DLL"); // 인스턴스 얻음.
    pSetLayeredWindowAttributes=(SLWA)GetProcAddress(hmodUSER32,"SetLayeredWindowAttributes");
    //함수포인터 얻음.
//  HWND hwnd = this->m_hWnd; //다이얼로그의 핸들 얻음.
    SetWindowLong(hwnd, GWL_EXSTYLE,GetWindowLong(hwnd, GWL_EXSTYLE) | WS_EX_LAYERED);
    pSetLayeredWindowAttributes(hwnd, 0, (255 * percent) / 100, LWA_ALPHA);
}